CVE-2020-27815

A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set extended attributes to panic the system, causing memory corruption or escalating privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

The Linux Kernel, the operating system core itself.

Security Fix(es):

A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.(CVE-2020-14351)

An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5.(CVE-2020-27675)

A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.(CVE-2020-25656)

Improper access control in BlueZ may allow an unauthenticated user to potentially enable information disclosure via adjacent access.(CVE-2020-12352)

A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.(CVE-2020-29661)

A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel.(CVE-2020-27777)

A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID, aka CID-c8bcd9c5be24.(CVE-2020-29660)

An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.(CVE-2020-29569)

A flaw was found in the JFS filesystem code. This flaw allows a local attacker with the ability to set extended attributes to panic the system, causing memory corruption or escalating privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.(CVE-2020-27815)

A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.(CVE-2020-27830)

A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set extended attributes to panic the system, causing memory corruption or escalating privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

The openSUSE Leap 15.2 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3444: Fixed an issue with the bpf verifier which did not properly handle mod32 destination register truncation when the source register was known to be 0 leading to out of bounds read (bsc#1184170).
• CVE-2021-3428: Fixed an integer overflow in ext4_es_cache_extent (bsc#1173485).
• CVE-2021-29647: Fixed an issue in qrtr_recvmsg which could have allowed attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure (bsc#1184192 ).
• CVE-2021-29265: Fixed an issue in usbip_sockfd_store which could have allowed attackers to cause a denial of service due to race conditions during an update of the local and shared status (bsc#1184167).
• CVE-2021-29264: Fixed an issue in the Freescale Gianfar Ethernet driver which could have allowed attackers to cause a system crash due to a calculation of negative fragment size (bsc#1184168).
• CVE-2021-28972: Fixed a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly (bsc#1184198).
• CVE-2021-28971: Fixed an issue in intel_pmu_drain_pebs_nhm which could have caused a system crash because the PEBS status in a PEBS record was mishandled (bsc#1184196 ).
• CVE-2021-28964: Fixed a race condition in get_old_root which could have allowed attackers to cause a denial of service (bsc#1184193).
• CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc#1183646).
• CVE-2021-28660: Fixed an out of bounds write in rtw_wx_set_scan (bsc#1183593 ).
• CVE-2021-28375: Fixed an issue in fastrpc_internal_invoke which did not prevent user applications from sending kernel RPC messages (bsc#1183596).
• CVE-2021-28038: Fixed an issue with the netback driver which was lacking necessary treatment of errors such as failed memory allocations (bsc#1183022).
• CVE-2021-27365: Fixed an issue where an unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message (bsc#1182715).
• CVE-2021-27364: Fixed an issue where an attacker could craft Netlink messages (bsc#1182717).
• CVE-2021-27363: Fixed a kernel pointer leak which could have been used to determine the address of the iscsi_transport structure (bsc#1182716).
• CVE-2020-35519: Fixed an out-of-bounds memory access was found in x25_bind (bsc#1183696).
• CVE-2020-27815: Fixed an issue in JFS filesystem where could have allowed an attacker to execute code (bsc#1179454).
• CVE-2020-27171: Fixed an off-by-one error affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183775).
• CVE-2020-27170: Fixed potential side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183686).
• CVE-2019-19769: Fixed a use-after-free in the perf_trace_lock_acquire function (bsc#1159280 ).
• CVE-2019-18814: Fixed a use-after-free when aa_label_parse() fails in aa_audit_rule_init() (bsc#1156256).

The following non-security bugs were fixed:

• 0007-block-add-docs-for-gendisk-request_queue-refcount-he.patch: (bsc#1171295, git fixes (block drivers)).
• 0008-block-revert-back-to-synchronous-request_queue-remov.patch: (bsc#1171295, git fixes (block drivers)).
• 0009-blktrace-fix-debugfs-use-after-free.patch: (bsc#1171295, git fixes (block drivers)).
• ACPI: bus: Constify is_acpi_node() and friends (part 2) (git-fixes).
• ACPICA: Always create namespace nodes using acpi_ns_create_node() (git-fixes).
• ACPICA: Enable sleep button on ACPI legacy wake (bsc#1181383).
• ACPICA: Fix race in generic_serial_bus (I2C) and GPIO op_region parameter handling (git-fixes).
• ACPI: scan: Rearrange memory allocation in acpi_device_add() (git-fixes).
• ACPI: video:…

The SUSE Linux Enterprise 15 SP2 kernel RT was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3444: Fixed an issue with the bpf verifier which did not properly handle mod32 destination register truncation when the source register was known to be 0 leading to out of bounds read (bsc#1184170).
• CVE-2021-3428: Fixed an integer overflow in ext4_es_cache_extent (bsc#1173485).
• CVE-2021-29647: Fixed an issue in qrtr_recvmsg which could have allowed attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure (bsc#1184192 ).
• CVE-2021-29265: Fixed an issue in usbip_sockfd_store which could have allowed attackers to cause a denial of service due to race conditions during an update of the local and shared status (bsc#1184167).
• CVE-2021-29264: Fixed an issue in the Freescale Gianfar Ethernet driver which could have allowed attackers to cause a system crash due to a calculation of negative fragment size (bsc#1184168).
• CVE-2021-28972: Fixed a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly (bsc#1184198).
• CVE-2021-28971: Fixed an issue in intel_pmu_drain_pebs_nhm which could have caused a system crash because the PEBS status in a PEBS record was mishandled (bsc#1184196 ).
• CVE-2021-28964: Fixed a race condition in get_old_root which could have allowed attackers to cause a denial of service (bsc#1184193).
• CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc#1183646).
• CVE-2021-28660: Fixed an out of bounds write in rtw_wx_set_scan (bsc#1183593 ).
• CVE-2021-28375: Fixed an issue in fastrpc_internal_invoke which did not prevent user applications from sending kernel RPC messages (bsc#1183596).
• CVE-2021-28038: Fixed an issue with the netback driver which was lacking necessary treatment of errors such as failed memory allocations (bsc#1183022).
• CVE-2021-27365: Fixed an issue where an unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message (bsc#1182715).
• CVE-2021-27364: Fixed an issue where an attacker could craft Netlink messages (bsc#1182717).
• CVE-2021-27363: Fixed a kernel pointer leak which could have been used to determine the address of the iscsi_transport structure (bsc#1182716).
• CVE-2020-35519: Fixed an out-of-bounds memory access was found in x25_bind (bsc#1183696).
• CVE-2020-27815: Fixed an issue in JFS filesystem where could have allowed an attacker to execute code (bsc#1179454).
• CVE-2020-27171: Fixed an off-by-one error affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183775).
• CVE-2020-27170: Fixed potential side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183686).
• CVE-2019-19769: Fixed a use-after-free in the perf_trace_lock_acquire function (bsc#1159280 ).
• CVE-2019-18814: Fixed a use-after-free when aa_label_parse() fails in aa_audit_rule_init() (bsc#1156256).
• CVE-2020-25670, CVE-2020-25671, CVE-2020-25672, CVE-2020-25673: Fixed multiple bugs in NFC subsytem (bsc#1178181).
• CVE-2020-36311: Fixed a denial of service (soft lockup) by triggering destruction of a large SEV VM (bsc#1184511).
• CVE-2021-29154: Fixed incorrect computation of branch displacements, allowing arbitrary code execution (bsc#1184391).
• CVE-2021-30002: Fixed a memory leak for large arguments in video_usercopy (bsc#1184120).
• CVE-2021-3483: Fixed a use-after-free in nosy.c (bsc#1184393).
• CVE-2020-36310: Fixed infinite loop for certain nested page faults (bsc#1184512).
• CVE-2020-36312: Fixed a memory leak upon a kmalloc failure (bsc#1184509 ).
• CVE-2021-28950: Fixed an issue in fs/fuse/fuse_i.h due to a retry loop continually…

The SUSE Linux Enterprise 15 SP3 Azure kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-33200: Enforcing incorrect limits for pointer arithmetic operations by the BPF verifier could be abused to perform out-of-bounds reads and writes in kernel memory (bsc#1186484).
• CVE-2021-33034: Fixed a use-after-free when destroying an hci_chan. This could lead to writing an arbitrary values. (bsc#1186111)
• CVE-2020-26139: Fixed a denial-of-service when an Access Point (AP) forwards EAPOL frames to other clients even though the sender has not yet successfully authenticated to the AP. (bnc#1186062)
• CVE-2021-23134: A Use After Free vulnerability in nfc sockets allowed local attackers to elevate their privileges. (bnc#1186060)
• CVE-2021-3491: Fixed a potential heap overflow in mem_rw(). This vulnerability is related to the PROVIDE_BUFFERS operation, which allowed the MAX_RW_COUNT limit to be bypassed (bsc#1185642).
• CVE-2021-32399: Fixed a race condition when removing the HCI controller (bnc#1184611).
• CVE-2020-24586: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a network. Under the right circumstances this can be abused to inject arbitrary network packets and/or exfiltrate user data (bnc#1185859).
• CVE-2020-24587: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed (bnc#1185859 bnc#1185862).
• CVE-2020-24588: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets. (bnc#1185861)
• CVE-2020-26147: The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments, even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used (bnc#1185859).
• CVE-2020-26145: An issue was discovered with Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3 implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets independent of the network configuration. (bnc#1185860)
• CVE-2020-26141: An issue was discovered in the ALFA driver for AWUS036H, where the Message Integrity Check (authenticity) of fragmented TKIP frames was not verified. An adversary can abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-confidentiality protocol. (bnc#1185987)
• CVE-2021-29650: Fixed an issue with the netfilter subsystem that allowed attackers to cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h lack a full memory barrier upon the assignment of a new table value (bnc#1184208).
• CVE-2021-29155: Fixed an issue that was discovered in kernel/bpf/verifier.c that performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation was not correctly accounted for when…

The SUSE Linux Enterprise 15 SP3 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-33200: Enforcing incorrect limits for pointer arithmetic operations by the BPF verifier could be abused to perform out-of-bounds reads and writes in kernel memory (bsc#1186484).
• CVE-2021-33034: Fixed a use-after-free when destroying an hci_chan. This could lead to writing an arbitrary values. (bsc#1186111)
• CVE-2020-26139: Fixed a denial-of-service when an Access Point (AP) forwards EAPOL frames to other clients even though the sender has not yet successfully authenticated to the AP. (bnc#1186062)
• CVE-2021-23134: A Use After Free vulnerability in nfc sockets allowed local attackers to elevate their privileges. (bnc#1186060)
• CVE-2021-3491: Fixed a potential heap overflow in mem_rw(). This vulnerability is related to the PROVIDE_BUFFERS operation, which allowed the MAX_RW_COUNT limit to be bypassed (bsc#1185642).
• CVE-2021-32399: Fixed a race condition when removing the HCI controller (bnc#1184611).
• CVE-2020-24586: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a network. Under the right circumstances this can be abused to inject arbitrary network packets and/or exfiltrate user data (bnc#1185859).
• CVE-2020-24587: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed (bnc#1185859 bnc#1185862).
• CVE-2020-24588: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets. (bnc#1185861)
• CVE-2020-26147: The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments, even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used (bnc#1185859).
• CVE-2020-26145: An issue was discovered with Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3 implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets independent of the network configuration. (bnc#1185860)
• CVE-2020-26141: An issue was discovered in the ALFA driver for AWUS036H, where the Message Integrity Check (authenticity) of fragmented TKIP frames was not verified. An adversary can abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-confidentiality protocol. (bnc#1185987)
• CVE-2021-29650: Fixed an issue with the netfilter subsystem that allowed attackers to cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h lack a full memory barrier upon the assignment of a new table value (bnc#1184208).
• CVE-2021-29155: Fixed an issue that was discovered in kernel/bpf/verifier.c that performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation was not correctly accounted for when restricting…

The SUSE Linux Enterprise 12 SP5 Azure kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3444: Fixed an issue with the bpf verifier which did not properly handle mod32 destination register truncation when the source register was known to be 0 leading to out of bounds read (bsc#1184170).
• CVE-2021-3428: Fixed an integer overflow in ext4_es_cache_extent (bsc#1173485).
• CVE-2021-29647: Fixed an issue in qrtr_recvmsg which could have allowed attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure (bsc#1184192 ).
• CVE-2021-29265: Fixed an issue in usbip_sockfd_store which could have allowed attackers to cause a denial of service due to race conditions during an update of the local and shared status (bsc#1184167).
• CVE-2021-29264: Fixed an issue in the Freescale Gianfar Ethernet driver which could have allowed attackers to cause a system crash due to a calculation of negative fragment size (bsc#1184168).
• CVE-2021-28972: Fixed a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly (bsc#1184198).
• CVE-2021-28971: Fixed an issue in intel_pmu_drain_pebs_nhm which could have caused a system crash because the PEBS status in a PEBS record was mishandled (bsc#1184196 ).
• CVE-2021-28964: Fixed a race condition in get_old_root which could have allowed attackers to cause a denial of service (bsc#1184193).
• CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc#1183646).
• CVE-2021-28660: Fixed an out of bounds write in rtw_wx_set_scan (bsc#1183593 ).
• CVE-2021-28038: Fixed an issue with the netback driver which was lacking necessary treatment of errors such as failed memory allocations (bsc#1183022).
• CVE-2021-27365: Fixed an issue where an unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message (bsc#1182715).
• CVE-2021-27364: Fixed an issue where an attacker could craft Netlink messages (bsc#1182717).
• CVE-2021-27363: Fixed a kernel pointer leak which could have been used to determine the address of the iscsi_transport structure (bsc#1182716).
• CVE-2020-35519: Fixed an out-of-bounds memory access was found in x25_bind (bsc#1183696).
• CVE-2020-27815: Fixed an issue in JFS filesystem where could have allowed an attacker to execute code (bsc#1179454).
• CVE-2020-27171: Fixed an off-by-one error affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183775).
• CVE-2020-27170: Fixed potential side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183686).
• CVE-2021-26930: Fixed an improper error handling in blkback's grant mapping (XSA-365 bsc#1181843).
• CVE-2021-26931: Fixed an issue where Linux kernel was treating grant mapping errors as bugs (XSA-362 bsc#1181753).
• CVE-2021-26932: Fixed improper error handling issues in Linux grant mapping (XSA-361 bsc#1181747).
• CVE-2020-29368,CVE-2020-29374: Fixed an issue in copy-on-write implementation which could have granted unintended write access because of a race condition in a THP mapcount check (bsc#1179660, bsc#1179428).
• CVE-2020-0433: Fixed a use after free due to improper locking which could have led to local escalation of privilege (bsc#1176720).

The following non-security bugs were fixed:

• ACPI: scan: Rearrange memory allocation in acpi_device_add() (git-fixes).
• ALSA: ctxfi: cthw20k2: fix mask on conf to allow 4 bits (git-fixes).
• ALSA: hda: Drop the BATCH workaround for AMD controllers (git-fixes).
• ALSA: hda/realtek: modify EAPD in the ALC886 (git-fixes).
• amba: Fix resource leak for drivers without .remove (git-fixes).
• bfq: Fix kABI for update internal depth state…

The SUSE Linux Enterprise 12 SP5 RT kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3444: Fixed an issue with the bpf verifier which did not properly handle mod32 destination register truncation when the source register was known to be 0 leading to out of bounds read (bsc#1184170).
• CVE-2021-3428: Fixed an integer overflow in ext4_es_cache_extent (bsc#1173485).
• CVE-2021-29647: Fixed an issue in qrtr_recvmsg which could have allowed attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure (bsc#1184192 ).
• CVE-2021-29265: Fixed an issue in usbip_sockfd_store which could have allowed attackers to cause a denial of service due to race conditions during an update of the local and shared status (bsc#1184167).
• CVE-2021-29264: Fixed an issue in the Freescale Gianfar Ethernet driver which could have allowed attackers to cause a system crash due to a calculation of negative fragment size (bsc#1184168).
• CVE-2021-28972: Fixed a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly (bsc#1184198).
• CVE-2021-28971: Fixed an issue in intel_pmu_drain_pebs_nhm which could have caused a system crash because the PEBS status in a PEBS record was mishandled (bsc#1184196 ).
• CVE-2021-28964: Fixed a race condition in get_old_root which could have allowed attackers to cause a denial of service (bsc#1184193).
• CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc#1183646).
• CVE-2021-28660: Fixed an out of bounds write in rtw_wx_set_scan (bsc#1183593 ).
• CVE-2021-28038: Fixed an issue with the netback driver which was lacking necessary treatment of errors such as failed memory allocations (bsc#1183022).
• CVE-2021-27365: Fixed an issue where an unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message (bsc#1182715).
• CVE-2021-27364: Fixed an issue where an attacker could craft Netlink messages (bsc#1182717).
• CVE-2021-27363: Fixed a kernel pointer leak which could have been used to determine the address of the iscsi_transport structure (bsc#1182716).
• CVE-2020-35519: Fixed an out-of-bounds memory access was found in x25_bind (bsc#1183696).
• CVE-2020-27815: Fixed an issue in JFS filesystem where could have allowed an attacker to execute code (bsc#1179454).
• CVE-2020-27171: Fixed an off-by-one error affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183775).
• CVE-2020-27170: Fixed potential side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183686).
• CVE-2021-26930: Fixed an improper error handling in blkback's grant mapping (XSA-365 bsc#1181843).
• CVE-2021-26931: Fixed an issue where Linux kernel was treating grant mapping errors as bugs (XSA-362 bsc#1181753).
• CVE-2021-26932: Fixed improper error handling issues in Linux grant mapping (XSA-361 bsc#1181747).
• CVE-2020-29368,CVE-2020-29374: Fixed an issue in copy-on-write implementation which could have granted unintended write access because of a race condition in a THP mapcount check (bsc#1179660, bsc#1179428).
• CVE-2020-0433: Fixed a use after free due to improper locking which could have led to local escalation of privilege (bsc#1176720).
• CVE-2020-27673: Fixed a potential denial of service at high rate of events to dom0, aka CID-e99502f76271 (bsc#1177411 ).

The following non-security bugs were fixed:

• ACPI: scan: Rearrange memory allocation in acpi_device_add() (git-fixes).
• ALSA: ctxfi: cthw20k2: fix mask on conf to allow 4 bits (git-fixes).
• ALSA: hda: Drop the BATCH workaround for AMD controllers (git-fixes).
• ALSA: hda/realtek: modify EAPD in the ALC886…

The SUSE Linux Enterprise 15 SP2 Azure kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3444: Fixed an issue with the bpf verifier which did not properly handle mod32 destination register truncation when the source register was known to be 0 leading to out of bounds read (bsc#1184170).
• CVE-2021-3428: Fixed an integer overflow in ext4_es_cache_extent (bsc#1173485).
• CVE-2021-29647: Fixed an issue in qrtr_recvmsg which could have allowed attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure (bsc#1184192 ).
• CVE-2021-29265: Fixed an issue in usbip_sockfd_store which could have allowed attackers to cause a denial of service due to race conditions during an update of the local and shared status (bsc#1184167).
• CVE-2021-29264: Fixed an issue in the Freescale Gianfar Ethernet driver which could have allowed attackers to cause a system crash due to a calculation of negative fragment size (bsc#1184168).
• CVE-2021-28972: Fixed a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly (bsc#1184198).
• CVE-2021-28971: Fixed an issue in intel_pmu_drain_pebs_nhm which could have caused a system crash because the PEBS status in a PEBS record was mishandled (bsc#1184196 ).
• CVE-2021-28964: Fixed a race condition in get_old_root which could have allowed attackers to cause a denial of service (bsc#1184193).
• CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc#1183646).
• CVE-2021-28660: Fixed an out of bounds write in rtw_wx_set_scan (bsc#1183593 ).
• CVE-2021-28375: Fixed an issue in fastrpc_internal_invoke which did not prevent user applications from sending kernel RPC messages (bsc#1183596).
• CVE-2021-28038: Fixed an issue with the netback driver which was lacking necessary treatment of errors such as failed memory allocations (bsc#1183022).
• CVE-2021-27365: Fixed an issue where an unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message (bsc#1182715).
• CVE-2021-27364: Fixed an issue where an attacker could craft Netlink messages (bsc#1182717).
• CVE-2021-27363: Fixed a kernel pointer leak which could have been used to determine the address of the iscsi_transport structure (bsc#1182716).
• CVE-2020-35519: Fixed an out-of-bounds memory access was found in x25_bind (bsc#1183696).
• CVE-2020-27815: Fixed an issue in JFS filesystem where could have allowed an attacker to execute code (bsc#1179454).
• CVE-2020-27171: Fixed an off-by-one error affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183775).
• CVE-2020-27170: Fixed potential side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183686).
• CVE-2019-19769: Fixed a use-after-free in the perf_trace_lock_acquire function (bsc#1159280 ).
• CVE-2019-18814: Fixed a use-after-free when aa_label_parse() fails in aa_audit_rule_init() (bsc#1156256).

The following non-security bugs were fixed:

• 0007-block-add-docs-for-gendisk-request_queue-refcount-he.patch: (bsc#1171295, git fixes (block drivers)).
• 0008-block-revert-back-to-synchronous-request_queue-remov.patch: (bsc#1171295, git fixes (block drivers)).
• 0009-blktrace-fix-debugfs-use-after-free.patch: (bsc#1171295, git fixes (block drivers)).
• ACPI: bus: Constify is_acpi_node() and friends (part 2) (git-fixes).
• ACPICA: Always create namespace nodes using acpi_ns_create_node() (git-fixes).
• ACPICA: Enable sleep button on ACPI legacy wake (bsc#1181383).
• ACPICA: Fix race in generic_serial_bus (I2C) and GPIO op_region parameter handling (git-fixes).
• ACPI: scan: Rearrange memory allocation in acpi_device_add() (git-fixes).
• ACPI:…

The SUSE Linux Enterprise 12 SP5 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3444: Fixed an issue with the bpf verifier which did not properly handle mod32 destination register truncation when the source register was known to be 0 leading to out of bounds read (bsc#1184170).
• CVE-2021-3428: Fixed an integer overflow in ext4_es_cache_extent (bsc#1173485).
• CVE-2021-29647: Fixed an issue in qrtr_recvmsg which could have allowed attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure (bsc#1184192 ).
• CVE-2021-29265: Fixed an issue in usbip_sockfd_store which could have allowed attackers to cause a denial of service due to race conditions during an update of the local and shared status (bsc#1184167).
• CVE-2021-29264: Fixed an issue in the Freescale Gianfar Ethernet driver which could have allowed attackers to cause a system crash due to a calculation of negative fragment size (bsc#1184168).
• CVE-2021-28972: Fixed a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly (bsc#1184198).
• CVE-2021-28971: Fixed an issue in intel_pmu_drain_pebs_nhm which could have caused a system crash because the PEBS status in a PEBS record was mishandled (bsc#1184196 ).
• CVE-2021-28964: Fixed a race condition in get_old_root which could have allowed attackers to cause a denial of service (bsc#1184193).
• CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc#1183646).
• CVE-2021-28660: Fixed an out of bounds write in rtw_wx_set_scan (bsc#1183593 ).
• CVE-2021-28038: Fixed an issue with the netback driver which was lacking necessary treatment of errors such as failed memory allocations (bsc#1183022).
• CVE-2021-27365: Fixed an issue where an unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message (bsc#1182715).
• CVE-2021-27364: Fixed an issue where an attacker could craft Netlink messages (bsc#1182717).
• CVE-2021-27363: Fixed a kernel pointer leak which could have been used to determine the address of the iscsi_transport structure (bsc#1182716).
• CVE-2021-26932: Fixed improper error handling issues in Linux grant mapping (XSA-361 bsc#1181747).
• CVE-2021-26931: Fixed an issue where Linux kernel was treating grant mapping errors as bugs (XSA-362 bsc#1181753).
• CVE-2021-26930: Fixed an improper error handling in blkback's grant mapping (XSA-365 bsc#1181843).
• CVE-2020-35519: Fixed an out-of-bounds memory access was found in x25_bind (bsc#1183696).
• CVE-2020-29368,CVE-2020-29374: Fixed an issue in copy-on-write implementation which could have granted unintended write access (bsc#1179660, bsc#1179428).
• CVE-2020-27815: Fixed an issue in JFS filesystem where could have allowed an attacker to execute code (bsc#1179454).
• CVE-2020-27171: Fixed an off-by-one error affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183775).
• CVE-2020-27170: Fixed potential side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183686).
• CVE-2020-0433: Fixed a use after free due to improper locking which could have led to local escalation of privilege (bsc#1176720).
• CVE-2021-3483: Fixed a use-after-free in nosy.c (bsc#1184393).
• CVE-2021-30002: Fixed a memory leak for large arguments in video_usercopy (bsc#1184120).
• CVE-2021-29154: Fixed incorrect computation of branch displacements, allowing arbitrary code execution (bsc#1184391).
• CVE-2021-20219: Fixed a denial of service in n_tty_receive_char_special (bsc#1184397).
• CVE-2020-36311: Fixed a denial of service (soft lockup) by triggering destruction of a large SEV VM (bsc#1184511).
• CVE-2020-25670,…

The SUSE Linux Enterprise 15 SP2 kernel RT was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3444: Fixed an issue with the bpf verifier which did not properly handle mod32 destination register truncation when the source register was known to be 0 leading to out of bounds read (bsc#1184170).
• CVE-2021-3428: Fixed an integer overflow in ext4_es_cache_extent (bsc#1173485).
• CVE-2021-29647: Fixed an issue in qrtr_recvmsg which could have allowed attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure (bsc#1184192 ).
• CVE-2021-29265: Fixed an issue in usbip_sockfd_store which could have allowed attackers to cause a denial of service due to race conditions during an update of the local and shared status (bsc#1184167).
• CVE-2021-29264: Fixed an issue in the Freescale Gianfar Ethernet driver which could have allowed attackers to cause a system crash due to a calculation of negative fragment size (bsc#1184168).
• CVE-2021-28972: Fixed a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly (bsc#1184198).
• CVE-2021-28971: Fixed an issue in intel_pmu_drain_pebs_nhm which could have caused a system crash because the PEBS status in a PEBS record was mishandled (bsc#1184196 ).
• CVE-2021-28964: Fixed a race condition in get_old_root which could have allowed attackers to cause a denial of service (bsc#1184193).
• CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc#1183646).
• CVE-2021-28660: Fixed an out of bounds write in rtw_wx_set_scan (bsc#1183593 ).
• CVE-2021-28375: Fixed an issue in fastrpc_internal_invoke which did not prevent user applications from sending kernel RPC messages (bsc#1183596).
• CVE-2021-28038: Fixed an issue with the netback driver which was lacking necessary treatment of errors such as failed memory allocations (bsc#1183022).
• CVE-2021-27365: Fixed an issue where an unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message (bsc#1182715).
• CVE-2021-27364: Fixed an issue where an attacker could craft Netlink messages (bsc#1182717).
• CVE-2021-27363: Fixed a kernel pointer leak which could have been used to determine the address of the iscsi_transport structure (bsc#1182716).
• CVE-2020-35519: Fixed an out-of-bounds memory access was found in x25_bind (bsc#1183696).
• CVE-2020-27815: Fixed an issue in JFS filesystem where could have allowed an attacker to execute code (bsc#1179454).
• CVE-2020-27171: Fixed an off-by-one error affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183775).
• CVE-2020-27170: Fixed potential side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183686).
• CVE-2019-19769: Fixed a use-after-free in the perf_trace_lock_acquire function (bsc#1159280 ).
• CVE-2019-18814: Fixed a use-after-free when aa_label_parse() fails in aa_audit_rule_init() (bsc#1156256).
• CVE-2020-25670, CVE-2020-25671, CVE-2020-25672, CVE-2020-25673: Fixed multiple bugs in NFC subsytem (bsc#1178181).
• CVE-2020-36311: Fixed a denial of service (soft lockup) by triggering destruction of a large SEV VM (bsc#1184511).
• CVE-2021-29154: Fixed incorrect computation of branch displacements, allowing arbitrary code execution (bsc#1184391).
• CVE-2021-30002: Fixed a memory leak for large arguments in video_usercopy (bsc#1184120).
• CVE-2021-3483: Fixed a use-after-free in nosy.c (bsc#1184393).
• CVE-2020-36310: Fixed infinite loop for certain nested page faults (bsc#1184512).
• CVE-2020-36312: Fixed a memory leak upon a kmalloc failure (bsc#1184509 ).
• CVE-2021-28950: Fixed an issue in fs/fuse/fuse_i.h due to a retry loop continually…

The SUSE Linux Enterprise 15 SP2 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3444: Fixed an issue with the bpf verifier which did not properly handle mod32 destination register truncation when the source register was known to be 0 leading to out of bounds read (bsc#1184170).
• CVE-2021-3428: Fixed an integer overflow in ext4_es_cache_extent (bsc#1173485).
• CVE-2021-29647: Fixed an issue in qrtr_recvmsg which could have allowed attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure (bsc#1184192 ).
• CVE-2021-29265: Fixed an issue in usbip_sockfd_store which could have allowed attackers to cause a denial of service due to race conditions during an update of the local and shared status (bsc#1184167).
• CVE-2021-29264: Fixed an issue in the Freescale Gianfar Ethernet driver which could have allowed attackers to cause a system crash due to a calculation of negative fragment size (bsc#1184168).
• CVE-2021-28972: Fixed a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly (bsc#1184198).
• CVE-2021-28971: Fixed an issue in intel_pmu_drain_pebs_nhm which could have caused a system crash because the PEBS status in a PEBS record was mishandled (bsc#1184196 ).
• CVE-2021-28964: Fixed a race condition in get_old_root which could have allowed attackers to cause a denial of service (bsc#1184193).
• CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc#1183646).
• CVE-2021-28660: Fixed an out of bounds write in rtw_wx_set_scan (bsc#1183593 ).
• CVE-2021-28375: Fixed an issue in fastrpc_internal_invoke which did not prevent user applications from sending kernel RPC messages (bsc#1183596).
• CVE-2021-28038: Fixed an issue with the netback driver which was lacking necessary treatment of errors such as failed memory allocations (bsc#1183022).
• CVE-2021-27365: Fixed an issue where an unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message (bsc#1182715).
• CVE-2021-27364: Fixed an issue where an attacker could craft Netlink messages (bsc#1182717).
• CVE-2021-27363: Fixed a kernel pointer leak which could have been used to determine the address of the iscsi_transport structure (bsc#1182716).
• CVE-2020-35519: Fixed an out-of-bounds memory access was found in x25_bind (bsc#1183696).
• CVE-2020-27815: Fixed an issue in JFS filesystem where could have allowed an attacker to execute code (bsc#1179454).
• CVE-2020-27171: Fixed an off-by-one error affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183775).
• CVE-2020-27170: Fixed potential side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183686).
• CVE-2019-19769: Fixed a use-after-free in the perf_trace_lock_acquire function (bsc#1159280 ).
• CVE-2019-18814: Fixed a use-after-free when aa_label_parse() fails in aa_audit_rule_init() (bsc#1156256).
• CVE-2021-3483: Fixed a use-after-free in nosy.c (bsc#1184393).
• CVE-2021-30002: Fixed a memory leak for large arguments in video_usercopy (bsc#1184120).
• CVE-2021-29154: Fixed incorrect computation of branch displacements, allowing arbitrary code execution (bsc#1184391).
• CVE-2021-28950: Fixed an issue in fs/fuse/fuse_i.h due to a retry loop continually was finding the same bad inode (bsc#1184194).
• CVE-2020-36312: Fixed a memory leak upon a kmalloc failure (bsc#1184509 ).
• CVE-2020-36311: Fixed a denial of service (soft lockup) by triggering destruction of a large SEV VM (bsc#1184511).
• CVE-2020-36310: Fixed infinite loop for certain nested page faults (bsc#1184512).
• CVE-2020-25670, CVE-2020-25671, CVE-2020-25672, CVE-2020-25673: Fixed…

The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2020-36312: Fixed an issue in virt/kvm/kvm_main.c that had a kvm_io_bus_unregister_dev memory leak upon a kmalloc failure (bnc#1184509).
• CVE-2021-29650: Fixed an issue inside the netfilter subsystem that allowed attackers to cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h lack a full memory barrier upon the assignment of a new table value (bnc#1184208).
• CVE-2021-29155: Fixed an issue within kernel/bpf/verifier.c that performed undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations (bnc#1184942).
• CVE-2020-36310: Fixed an issue in arch/x86/kvm/svm/svm.c that allowed a set_memory_region_test infinite loop for certain nested page faults (bnc#1184512).
• CVE-2020-27673: Fixed an issue in Xen where a guest OS users could have caused a denial of service (host OS hang) via a high rate of events to dom0 (bnc#1177411, bnc#1184583).
• CVE-2021-29154: Fixed BPF JIT compilers that allowed to execute arbitrary code within the kernel context (bnc#1184391).
• CVE-2020-25673: Fixed NFC endless loops caused by repeated llcp_sock_connect() (bsc#1178181).
• CVE-2020-25672: Fixed NFC memory leak in llcp_sock_connect() (bsc#1178181).
• CVE-2020-25671: Fixed NFC refcount leak in llcp_sock_connect() (bsc#1178181).
• CVE-2020-25670: Fixed NFC refcount leak in llcp_sock_bind() (bsc#1178181).
• CVE-2020-36311: Fixed an issue in arch/x86/kvm/svm/sev.c that allowed attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions) (bnc#1184511).
• CVE-2021-28950: Fixed an issue in fs/fuse/fuse_i.h where a 'stall on CPU' could have occured because a retry loop continually finds the same bad inode (bnc#1184194, bnc#1184211).
• CVE-2020-36322: Fixed an issue inside the FUSE filesystem implementation where fuse_do_getattr() calls make_bad_inode() in inappropriate situations, could have caused a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950 (bnc#1184211).
• CVE-2021-30002: Fixed a memory leak issue when a webcam device exists (bnc#1184120).
• CVE-2021-3483: Fixed a use-after-free bug in nosy_ioctl() (bsc#1184393).
• CVE-2021-20219: Fixed a denial of service vulnerability in drivers/tty/n_tty.c of the Linux kernel. In this flaw a local attacker with a normal user privilege could have delayed the loop and cause a threat to the system availability (bnc#1184397).
• CVE-2021-28964: Fixed a race condition in fs/btrfs/ctree.c that could have caused a denial of service because of a lack of locking on an extent buffer before a cloning operation (bnc#1184193).
• CVE-2021-3444: Fixed the bpf verifier as it did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution (bnc#1184170).
• CVE-2021-28971: Fixed a potential local denial of service in intel_pmu_drain_pebs_nhm where userspace applications can cause a system crash because the PEBS status in a PEBS record is mishandled (bnc#1184196).
• CVE-2021-28688: Fixed XSA-365 that includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite…

The SUSE Linux Enterprise 12 SP4 LTSS kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2020-36312: Fixed an issue in virt/kvm/kvm_main.c that had a kvm_io_bus_unregister_dev memory leak upon a kmalloc failure (bnc#1184509).
• CVE-2021-29650: Fixed an issue inside the netfilter subsystem that allowed attackers to cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h lack a full memory barrier upon the assignment of a new table value (bnc#1184208).
• CVE-2021-29155: Fixed an issue within kernel/bpf/verifier.c that performed undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations (bnc#1184942).
• CVE-2020-36310: Fixed an issue in arch/x86/kvm/svm/svm.c that allowed a set_memory_region_test infinite loop for certain nested page faults (bnc#1184512).
• CVE-2020-27673: Fixed an issue in Xen where a guest OS users could have caused a denial of service (host OS hang) via a high rate of events to dom0 (bnc#1177411, bnc#1184583).
• CVE-2021-29154: Fixed BPF JIT compilers that allowed to execute arbitrary code within the kernel context (bnc#1184391).
• CVE-2020-25673: Fixed NFC endless loops caused by repeated llcp_sock_connect() (bsc#1178181).
• CVE-2020-25672: Fixed NFC memory leak in llcp_sock_connect() (bsc#1178181).
• CVE-2020-25671: Fixed NFC refcount leak in llcp_sock_connect() (bsc#1178181).
• CVE-2020-25670: Fixed NFC refcount leak in llcp_sock_bind() (bsc#1178181).
• CVE-2020-36311: Fixed an issue in arch/x86/kvm/svm/sev.c that allowed attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions) (bnc#1184511).
• CVE-2021-28950: Fixed an issue in fs/fuse/fuse_i.h where a 'stall on CPU' could have occured because a retry loop continually finds the same bad inode (bnc#1184194, bnc#1184211).
• CVE-2020-36322: Fixed an issue inside the FUSE filesystem implementation where fuse_do_getattr() calls make_bad_inode() in inappropriate situations, could have caused a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950 (bnc#1184211).
• CVE-2021-30002: Fixed a memory leak issue when a webcam device exists (bnc#1184120).
• CVE-2021-3483: Fixed a use-after-free bug in nosy_ioctl() (bsc#1184393).
• CVE-2021-20219: Fixed a denial of service vulnerability in drivers/tty/n_tty.c of the Linux kernel. In this flaw a local attacker with a normal user privilege could have delayed the loop and cause a threat to the system availability (bnc#1184397).
• CVE-2021-28964: Fixed a race condition in fs/btrfs/ctree.c that could have caused a denial of service because of a lack of locking on an extent buffer before a cloning operation (bnc#1184193).
• CVE-2021-3444: Fixed the bpf verifier as it did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution (bnc#1184170).
• CVE-2021-28971: Fixed a potential local denial of service in intel_pmu_drain_pebs_nhm where userspace applications can cause a system crash because the PEBS status in a PEBS record is mishandled (bnc#1184196).
• CVE-2021-28688: Fixed XSA-365 that includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also…

The SUSE Linux Enterprise 15 SP1 LTSS kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2020-36312: Fixed an issue in virt/kvm/kvm_main.c that had a kvm_io_bus_unregister_dev memory leak upon a kmalloc failure (bnc#1184509).
• CVE-2021-29650: Fixed an issue inside the netfilter subsystem that allowed attackers to cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h lack a full memory barrier upon the assignment of a new table value (bnc#1184208).
• CVE-2021-29155: Fixed an issue within kernel/bpf/verifier.c that performed undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations (bnc#1184942).
• CVE-2020-36310: Fixed an issue in arch/x86/kvm/svm/svm.c that allowed a set_memory_region_test infinite loop for certain nested page faults (bnc#1184512).
• CVE-2020-27673: Fixed an issue in Xen where a guest OS users could have caused a denial of service (host OS hang) via a high rate of events to dom0 (bnc#1177411, bnc#1184583).
• CVE-2021-29154: Fixed BPF JIT compilers that allowed to execute arbitrary code within the kernel context (bnc#1184391).
• CVE-2020-25673: Fixed NFC endless loops caused by repeated llcp_sock_connect() (bsc#1178181).
• CVE-2020-25672: Fixed NFC memory leak in llcp_sock_connect() (bsc#1178181).
• CVE-2020-25671: Fixed NFC refcount leak in llcp_sock_connect() (bsc#1178181).
• CVE-2020-25670: Fixed NFC refcount leak in llcp_sock_bind() (bsc#1178181).
• CVE-2020-36311: Fixed an issue in arch/x86/kvm/svm/sev.c that allowed attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions) (bnc#1184511).
• CVE-2021-28950: Fixed an issue in fs/fuse/fuse_i.h where a 'stall on CPU' could have occured because a retry loop continually finds the same bad inode (bnc#1184194, bnc#1184211).
• CVE-2020-36322: Fixed an issue inside the FUSE filesystem implementation where fuse_do_getattr() calls make_bad_inode() in inappropriate situations, could have caused a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950 (bnc#1184211).
• CVE-2021-30002: Fixed a memory leak issue when a webcam device exists (bnc#1184120).
• CVE-2021-3483: Fixed a use-after-free bug in nosy_ioctl() (bsc#1184393).
• CVE-2021-20219: Fixed a denial of service vulnerability in drivers/tty/n_tty.c of the Linux kernel. In this flaw a local attacker with a normal user privilege could have delayed the loop and cause a threat to the system availability (bnc#1184397).
• CVE-2021-28964: Fixed a race condition in fs/btrfs/ctree.c that could have caused a denial of service because of a lack of locking on an extent buffer before a cloning operation (bnc#1184193).
• CVE-2021-3444: Fixed the bpf verifier as it did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution (bnc#1184170).
• CVE-2021-28971: Fixed a potential local denial of service in intel_pmu_drain_pebs_nhm where userspace applications can cause a system crash because the PEBS status in a PEBS record is mishandled (bnc#1184196).
• CVE-2021-28688: Fixed XSA-365 that includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also…

The SUSE Linux Enterprise 15 SP2 kernel RT was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3444: Fixed an issue with the bpf verifier which did not properly handle mod32 destination register truncation when the source register was known to be 0 leading to out of bounds read (bsc#1184170).
• CVE-2021-3428: Fixed an integer overflow in ext4_es_cache_extent (bsc#1173485).
• CVE-2021-29647: Fixed an issue in qrtr_recvmsg which could have allowed attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure (bsc#1184192 ).
• CVE-2021-29265: Fixed an issue in usbip_sockfd_store which could have allowed attackers to cause a denial of service due to race conditions during an update of the local and shared status (bsc#1184167).
• CVE-2021-29264: Fixed an issue in the Freescale Gianfar Ethernet driver which could have allowed attackers to cause a system crash due to a calculation of negative fragment size (bsc#1184168).
• CVE-2021-28972: Fixed a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly (bsc#1184198).
• CVE-2021-28971: Fixed an issue in intel_pmu_drain_pebs_nhm which could have caused a system crash because the PEBS status in a PEBS record was mishandled (bsc#1184196 ).
• CVE-2021-28964: Fixed a race condition in get_old_root which could have allowed attackers to cause a denial of service (bsc#1184193).
• CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc#1183646).
• CVE-2021-28660: Fixed an out of bounds write in rtw_wx_set_scan (bsc#1183593 ).
• CVE-2021-28375: Fixed an issue in fastrpc_internal_invoke which did not prevent user applications from sending kernel RPC messages (bsc#1183596).
• CVE-2021-28038: Fixed an issue with the netback driver which was lacking necessary treatment of errors such as failed memory allocations (bsc#1183022).
• CVE-2021-27365: Fixed an issue where an unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message (bsc#1182715).
• CVE-2021-27364: Fixed an issue where an attacker could craft Netlink messages (bsc#1182717).
• CVE-2021-27363: Fixed a kernel pointer leak which could have been used to determine the address of the iscsi_transport structure (bsc#1182716).
• CVE-2020-35519: Fixed an out-of-bounds memory access was found in x25_bind (bsc#1183696).
• CVE-2020-27815: Fixed an issue in JFS filesystem where could have allowed an attacker to execute code (bsc#1179454).
• CVE-2020-27171: Fixed an off-by-one error affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183775).
• CVE-2020-27170: Fixed potential side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory (bsc#1183686).
• CVE-2019-19769: Fixed a use-after-free in the perf_trace_lock_acquire function (bsc#1159280 ).
• CVE-2019-18814: Fixed a use-after-free when aa_label_parse() fails in aa_audit_rule_init() (bsc#1156256).
• CVE-2020-25670, CVE-2020-25671, CVE-2020-25672, CVE-2020-25673: Fixed multiple bugs in NFC subsytem (bsc#1178181).
• CVE-2020-36311: Fixed a denial of service (soft lockup) by triggering destruction of a large SEV VM (bsc#1184511).
• CVE-2021-29154: Fixed incorrect computation of branch displacements, allowing arbitrary code execution (bsc#1184391).
• CVE-2021-30002: Fixed a memory leak for large arguments in video_usercopy (bsc#1184120).
• CVE-2021-3483: Fixed a use-after-free in nosy.c (bsc#1184393).
• CVE-2020-36310: Fixed infinite loop for certain nested page faults (bsc#1184512).
• CVE-2020-36312: Fixed a memory leak upon a kmalloc failure (bsc#1184509 ).
• CVE-2021-28950: Fixed an issue in fs/fuse/fuse_i.h due to a retry loop continually…

The SUSE Linux Enterprise 15 SP3 Azure kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-33200: Enforcing incorrect limits for pointer arithmetic operations by the BPF verifier could be abused to perform out-of-bounds reads and writes in kernel memory (bsc#1186484).
• CVE-2021-33034: Fixed a use-after-free when destroying an hci_chan. This could lead to writing an arbitrary values. (bsc#1186111)
• CVE-2020-26139: Fixed a denial-of-service when an Access Point (AP) forwards EAPOL frames to other clients even though the sender has not yet successfully authenticated to the AP. (bnc#1186062)
• CVE-2021-23134: A Use After Free vulnerability in nfc sockets allowed local attackers to elevate their privileges. (bnc#1186060)
• CVE-2021-3491: Fixed a potential heap overflow in mem_rw(). This vulnerability is related to the PROVIDE_BUFFERS operation, which allowed the MAX_RW_COUNT limit to be bypassed (bsc#1185642).
• CVE-2021-32399: Fixed a race condition when removing the HCI controller (bnc#1184611).
• CVE-2020-24586: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a network. Under the right circumstances this can be abused to inject arbitrary network packets and/or exfiltrate user data (bnc#1185859).
• CVE-2020-24587: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed (bnc#1185859 bnc#1185862).
• CVE-2020-24588: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets. (bnc#1185861)
• CVE-2020-26147: The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments, even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used (bnc#1185859).
• CVE-2020-26145: An issue was discovered with Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3 implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets independent of the network configuration. (bnc#1185860)
• CVE-2020-26141: An issue was discovered in the ALFA driver for AWUS036H, where the Message Integrity Check (authenticity) of fragmented TKIP frames was not verified. An adversary can abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-confidentiality protocol. (bnc#1185987)
• CVE-2021-29650: Fixed an issue with the netfilter subsystem that allowed attackers to cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h lack a full memory barrier upon the assignment of a new table value (bnc#1184208).
• CVE-2021-29155: Fixed an issue that was discovered in kernel/bpf/verifier.c that performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation was not correctly accounted for when…

The SUSE Linux Enterprise 15 SP3 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-33200: Enforcing incorrect limits for pointer arithmetic operations by the BPF verifier could be abused to perform out-of-bounds reads and writes in kernel memory (bsc#1186484).
• CVE-2021-33034: Fixed a use-after-free when destroying an hci_chan. This could lead to writing an arbitrary values. (bsc#1186111)
• CVE-2020-26139: Fixed a denial-of-service when an Access Point (AP) forwards EAPOL frames to other clients even though the sender has not yet successfully authenticated to the AP. (bnc#1186062)
• CVE-2021-23134: A Use After Free vulnerability in nfc sockets allowed local attackers to elevate their privileges. (bnc#1186060)
• CVE-2021-3491: Fixed a potential heap overflow in mem_rw(). This vulnerability is related to the PROVIDE_BUFFERS operation, which allowed the MAX_RW_COUNT limit to be bypassed (bsc#1185642).
• CVE-2021-32399: Fixed a race condition when removing the HCI controller (bnc#1184611).
• CVE-2020-24586: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a network. Under the right circumstances this can be abused to inject arbitrary network packets and/or exfiltrate user data (bnc#1185859).
• CVE-2020-24587: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed (bnc#1185859 bnc#1185862).
• CVE-2020-24588: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets. (bnc#1185861)
• CVE-2020-26147: The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments, even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used (bnc#1185859).
• CVE-2020-26145: An issue was discovered with Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3 implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets independent of the network configuration. (bnc#1185860)
• CVE-2020-26141: An issue was discovered in the ALFA driver for AWUS036H, where the Message Integrity Check (authenticity) of fragmented TKIP frames was not verified. An adversary can abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-confidentiality protocol. (bnc#1185987)
• CVE-2021-29650: Fixed an issue with the netfilter subsystem that allowed attackers to cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h lack a full memory barrier upon the assignment of a new table value (bnc#1184208).
• CVE-2021-29155: Fixed an issue that was discovered in kernel/bpf/verifier.c that performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation was not correctly accounted for when restricting…

It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service (system crash). (CVE-2020-27815)

It was discovered that the memory management subsystem in the Linux kernel did not properly handle copy-on-write operations in some situations. A local attacker could possibly use this to gain unintended write access to read-only memory pages. (CVE-2020-29374)

Michael Kurth and Pawel Wieczorkiewicz discovered that the Xen event processing backend in the Linux kernel did not properly limit the number of events queued. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29568)

Jann Horn discovered that the tty subsystem of the Linux kernel did not use consistent locking in some situations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2020-29660)

Jann Horn discovered a race condition in the tty subsystem of the Linux kernel in the locking for the TIOCSPGRP ioctl(), leading to a use-after- free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-29661)

Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2020-25669)

It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service (system crash). (CVE-2020-27815)

Shisong Qin and Bodong Zhao discovered that Speakup screen reader driver in the Linux kernel did not correctly handle setting line discipline in some situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-27830, CVE-2020-28941)

It was discovered that the memory management subsystem in the Linux kernel did not properly handle copy-on-write operations in some situations. A local attacker could possibly use this to gain unintended write access to read-only memory pages. (CVE-2020-29374)

Michael Kurth and Pawel Wieczorkiewicz discovered that the Xen event processing backend in the Linux kernel did not properly limit the number of events queued. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29568)

Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the Xen paravirt block backend in the Linux kernel, leading to a use-after-free vulnerability. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29569)

Jann Horn discovered that the tty subsystem of the Linux kernel did not use consistent locking in some situations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2020-29660)

Jann Horn discovered a race condition in the tty subsystem of the Linux kernel in the locking for the TIOCSPGRP ioctl(), leading to a use-after- free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-29661)

Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2020-25669)

It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service (system crash). (CVE-2020-27815)

Shisong Qin and Bodong Zhao discovered that Speakup screen reader driver in the Linux kernel did not correctly handle setting line discipline in some situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-27830, CVE-2020-28941)

It was discovered that an information leak existed in the syscall implementation in the Linux kernel on 32 bit systems. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-28588)

Michael Kurth and Pawel Wieczorkiewicz discovered that the Xen event processing backend in the Linux kernel did not properly limit the number of events queued. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29568)

Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the Xen paravirt block backend in the Linux kernel, leading to a use-after-free vulnerability. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29569)

Jann Horn discovered that the tty subsystem of the Linux kernel did not use consistent locking in some situations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2020-29660)

Jann Horn discovered a race condition in the tty subsystem of the Linux kernel in the locking for the TIOCSPGRP ioctl(), leading to a use-after- free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-29661)

It was discovered that the netfilter subsystem in the Linux kernel did not properly handle filter rules in some situations. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service. (CVE-2021-20177)

It was discovered that the console keyboard driver in the Linux kernel contained a race condition. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-25656)

Minh Yuan discovered that the tty driver in the Linux kernel contained race conditions when handling fonts. A local attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2020-25668)

Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2020-25669)

Kiyin (尹亮) discovered that the perf subsystem in the Linux kernel did not properly deallocate memory in some situations. A privileged attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2020-25704)

Julien Grall discovered that the Xen dom0 event handler in the Linux kernel did not properly limit the number of events queued. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-27673)

Jinoh Kang discovered that the Xen event channel infrastructure in the Linux kernel contained a race condition. An attacker in guest could possibly use this to cause a denial of service (dom0 crash). (CVE-2020-27675)

Daniel Axtens discovered that PowerPC RTAS implementation in the Linux kernel did not properly restrict memory accesses in some situations. A privileged local attacker could use this to arbitrarily modify kernel memory, potentially bypassing kernel lockdown restrictions. (CVE-2020-27777)

It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service (system crash). (CVE-2020-27815)

Shisong Qin and Bodong Zhao discovered that Speakup screen reader driver in the Linux kernel did not correctly handle setting line discipline in some situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-27830, CVE-2020-28941)

It was discovered that a use-after-free vulnerability existed in the infiniband hfi1 device driver in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2020-27835)

It was discovered that an information leak existed in the syscall implementation in the Linux kernel on 32 bit systems. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-28588)

Minh Yuan discovered that the framebuffer console driver in the Linux kernel did not properly handle fonts in some conditions. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2020-28974)

Michael Kurth and Pawel Wieczorkiewicz discovered that the Xen event processing backend in the Linux kernel did not properly limit the number of events queued. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29568)

Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the Xen paravirt block backend in the Linux kernel, leading to a use-after-free vulnerability. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29569)

Jann Horn discovered that the tty subsystem of the Linux kernel did not use consistent locking in some situations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2020-29660)

Jann Horn discovered a race condition in the tty subsystem of the Linux kernel in the locking for the TIOCSPGRP ioctl(), leading to a use-after- free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-29661)

It was discovered that a…

Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered that legacy pairing and secure-connections pairing authentication in the Bluetooth protocol could allow an unauthenticated user to complete authentication without pairing credentials via adjacent access. A physically proximate attacker could use this to impersonate a previously paired Bluetooth device. (CVE-2020-10135)

Jay Shin discovered that the ext4 file system implementation in the Linux kernel did not properly handle directory access with broken indexing, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-14314)

It was discovered that the block layer implementation in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-15436)

It was discovered that the serial port driver in the Linux kernel did not properly initialize a pointer in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2020-15437)

Andy Nguyen discovered that the Bluetooth HCI event packet parser in the Linux kernel did not properly handle event advertisements of certain sizes, leading to a heap-based buffer overflow. A physically proximate remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-24490)

It was discovered that the NFS client implementation in the Linux kernel did not properly perform bounds checking before copying security labels in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25212)

It was discovered that the Rados block device (rbd) driver in the Linux kernel did not properly perform privilege checks for access to rbd devices in some situations. A local attacker could use this to map or unmap rbd block devices. (CVE-2020-25284)

It was discovered that the block layer subsystem in the Linux kernel did not properly handle zero-length requests. A local attacker could use this to cause a denial of service. (CVE-2020-25641)

It was discovered that the HDLC PPP implementation in the Linux kernel did not properly validate input in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25643)

Kiyin (尹亮) discovered that the perf subsystem in the Linux kernel did not properly deallocate memory in some situations. A privileged attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2020-25704)

It was discovered that the KVM hypervisor in the Linux kernel did not properly handle interrupts in certain situations. A local attacker in a guest VM could possibly use this to cause a denial of service (host system crash). (CVE-2020-27152)

It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service (system crash). (CVE-2020-27815)

It was discovered that an information leak existed in the syscall implementation in the Linux kernel on 32 bit systems. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-28588)

It was discovered that the framebuffer implementation in the Linux kernel did not properly perform range checks in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-28915)

Jann Horn discovered a race condition in the copy-on-write implementation in the Linux kernel when handling hugepages. A local attacker could use this to gain unintended write access to read-only memory pages. (CVE-2020-29368)

Jann Horn discovered that the mmap implementation in the Linux kernel contained a race…