CVE-2020-0433

In blk_mq_queue_tag_busy_iter of blk-mq-tag.c, there is a possible use after free due to improper locking. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-151939299

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 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 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 12 SP2 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-2021-29154: 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-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-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-2021-29265: Fixed an issue in usbip_sockfd_store in drivers/usb/usbip/stub_dev.c that allowed attackers to cause a denial of service (GPF) because the stub-up sequence has race conditions during an update of the local and shared status (bnc#1184167).
• CVE-2021-29264: Fixed an issue in drivers/net/ethernet/freescale/gianfar.c in the Freescale Gianfar Ethernet driver that allowed attackers to cause a system crash because a negative fragment size is calculated in situations involving an rx queue overrun when jumbo packets are used and NAPI is enabled (bnc#1184168).
• CVE-2021-28972: Fixed an issue in drivers/pci/hotplug/rpadlpar_sysfs.c where the RPA PCI Hotplug driver had 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. This occurs because add_slot_store and remove_slot_store mishandle drc_name '\0' termination (bnc#1184198).
• CVE-2021-28660: Fixed rtw_wx_set_scan in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c that allowed writing beyond the end of the ssid array (bnc#1183593).
• CVE-2020-0433: Fixed blk_mq_queue_tag_busy_iter of blk-mq-tag.c, where a possible use after free due to improper locking could have happened. This could have led to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation (bnc#1176720).
• CVE-2021-27365: Fixed an issue inside the iSCSI data structures that does not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. 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 (bnc#1182715).
• CVE-2021-27363: Fixed an issue with a kernel pointer leak that could have been used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables (bnc#1182716).
• CVE-2021-27364: Fixed an issue in…

The SUSE Linux Enterprise 12 SP2 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-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-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-2021-29265: Fixed an issue in usbip_sockfd_store in drivers/usb/usbip/stub_dev.c that allowed attackers to cause a denial of service (GPF) because the stub-up sequence has race conditions during an update of the local and shared status (bnc#1184167).
• CVE-2021-29264: Fixed an issue in drivers/net/ethernet/freescale/gianfar.c in the Freescale Gianfar Ethernet driver that allowed attackers to cause a system crash because a negative fragment size is calculated in situations involving an rx queue overrun when jumbo packets are used and NAPI is enabled (bnc#1184168).
• CVE-2021-28972: Fixed an issue in drivers/pci/hotplug/rpadlpar_sysfs.c where the RPA PCI Hotplug driver had 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. This occurs because add_slot_store and remove_slot_store mishandle drc_name '\0' termination (bnc#1184198).
• CVE-2021-28660: Fixed rtw_wx_set_scan in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c that allowed writing beyond the end of the ssid array (bnc#1183593).
• CVE-2020-0433: Fixed blk_mq_queue_tag_busy_iter of blk-mq-tag.c, where a possible use after free due to improper locking could have happened. This could have led to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation (bnc#1176720).
• CVE-2021-28038: Fixed an issue with Xen PV. A certain part of the netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931 (bnc#1183022, bnc#1183069).
• CVE-2021-27365: Fixed an issue inside the iSCSI data…

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…

This update for the Linux Kernel 4.12.14-150_52 fixes several issues.

The following security issues were fixed:

• 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 (bsc#1184952).
• CVE-2020-0433: Fixed blk_mq_queue_tag_busy_iter of blk-mq-tag.c, where a possible use after free due to improper locking could have happened. This could have led to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation (bnc#1178066).
• CVE-2021-29154: Fixed BPF JIT compilers that allowed to execute arbitrary code within the kernel context (bsc#1184710)