CVE-2020-29569

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.

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)

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.

The openSUSE Leap 15.1 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2020-29568: An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable (bnc#1179508).
• CVE-2020-29569: 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 (bnc#1179509).
• CVE-2020-25639: Bail out of nouveau_channel_new if channel init fails (bsc#1176846).
• CVE-2020-28374: In drivers/target/target_core_xcopy.c insufficient identifier checking in the LIO SCSI target code can be used by remote attackers to read or write files via directory traversal in an XCOPY request, aka CID-2896c93811e3. For example, an attack can occur over a network if the attacker has access to one iSCSI LUN. The attacker gains control over file access because I/O operations are proxied via an attacker-selected backstore (bnc#1178372 1180676).
• CVE-2020-36158: mwifiex_cmd_802_11_ad_hoc_start in drivers/net/wireless/marvell/mwifiex/join.c might allow remote attackers to execute arbitrary code via a long SSID value, aka CID-5c455c5ab332 (bnc#1180559).
• CVE-2020-27825: A use-after-free flaw was found in kernel/trace/ring_buffer.c. There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat (bnc#1179960).
• CVE-2020-0466: In do_epoll_ctl and ep_loop_check_proc of eventpoll.c, there is a possible use after free due to a logic error. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation (bnc#1180031).
• CVE-2020-27068: In the nl80211_policy policy of nl80211.c, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not required for exploitation (bnc#1180086).
• CVE-2020-0465: In various methods of hid-multitouch.c, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation (bnc#1180029).
• CVE-2020-0444: In audit_free_lsm_field of auditfilter.c, there is a possible bad kfree due to a logic error in audit_data_to_entry. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation (bnc#1180027).
• CVE-2020-29660: A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may have allowed a read-after-free attack against TIOCGSID, aka CID-c8bcd9c5be24 (bnc#1179745).
• CVE-2020-29661: A locking issue was discovered in the tty subsystem of the Linux kernel drivers/tty/tty_jobctrl.c allowed a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b (bnc#1179745).
• CVE-2020-27777: A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure…

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

The following security bugs were fixed:

• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2021-3348: Fixed a use-after-free in nbd_add_socket that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup (bnc#1181504).
• CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).
• CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required. (bnc#1180812)
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).

The following non-security bugs were fixed:

• ACPI/IORT: Do not blindly trust DMA masks from firmware (git-fixes).
• ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI (git-fixes).
• ACPI: scan: Harden acpi_device_add() against device ID overflows (git-fixes).
• ACPI: scan: Make acpi_bus_get_device() clear return pointer on error (git-fixes).
• ACPI: sysfs: Prefer 'compatible' modalias (git-fixes).
• ALSA: doc: Fix reference to mixart.rst (git-fixes).
• ALSA: fireface: Fix integer overflow in transmit_midi_msg() (git-fixes).
• ALSA: firewire-tascam: Fix integer overflow in midi_port_work() (git-fixes).
• ALSA: hda: Add Cometlake-R PCI ID (git-fixes).
• ALSA: hda/hdmi - enable runtime pm for CI AMD display audio (git-fixes).
• ALSA: hda/realtek: Enable headset of ASUS B1400CEPE with ALC256 (git-fixes).
• ALSA: hda/realtek: fix right sounds and mute/micmute LEDs for HP machines (git-fixes).
• ALSA: hda/realtek - Limit int mic boost on Acer Aspire E5-575T (git-fixes).
• ALSA: hda/tegra: fix tegra-hda on tegra30 soc (git-fixes).
• ALSA: hda/via: Add minimum mute flag (git-fixes).
• ALSA: hda/via: Apply the workaround generically for Clevo machines (git-fixes).
• ALSA: pcm: fix hw_rule deps kABI (bsc#1181014).
• ALSA: pcm: One more dependency for hw constraints (bsc#1181014).
• ALSA: seq: oss: Fix missing error check in snd_seq_oss_synth_make_info() (git-fixes).
• ALSA: usb-audio: Always apply the hw constraints for implicit fb sync (bsc#1181014).
• ALSA: usb-audio: Annotate the endpoint index in audioformat (git-fixes).
• ALSA: usb-audio: Avoid implicit feedback on Pioneer devices (bsc#1181014).
• ALSA: usb-audio: Avoid unnecessary interface re-setup (git-fixes).
• ALSA: usb-audio: Choose audioformat of a counter-part substream (git-fixes).
• ALSA: usb-audio: Fix hw constraints dependencies (bsc#1181014).
• ALSA: usb-audio: Fix implicit feedback sync setup for Pioneer devices (git-fixes).
• ALSA: usb-audio: Fix the missing endpoints creations for quirks (git-fixes).
• ALSA: usb-audio: Fix UAC1 rate setup for secondary endpoints (bsc#1181014).
• ALSA: usb-audio: Set sample rate for all sharing EPs on UAC1 (bsc#1181014).
• arch/x86/lib/usercopy_64.c: fix __copy_user_flushcache() cache writeback (bsc#1152489).
• arm64: pgtable: Ensure dirty bit is preserved across pte_wrprotect() (bsc#1180130).
• arm64: pgtable: Fix pte_accessible() (bsc#1180130).
• ASoC: ak4458: correct reset polarity (git-fixes).
• ASoC: dapm: remove widget from dirty list on free (git-fixes).
• ASoC: Intel: fix error code cnl_set_dsp_D0() (git-fixes).
• ASoC: meson: axg-tdm-interface: fix loopback (git-fixes). -…

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

The following security bugs were fixed:

• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2021-3348: Fixed a use-after-free in nbd_add_socket that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup (bnc#1181504).
• CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).
• CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required. (bnc#1180812)
• CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).
• CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).
• CVE-2020-36158: Fixed an issue wich might have allowed a remote attackers to execute arbitrary code via a long SSID value in mwifiex_cmd_802_11_ad_hoc_start() (bnc#1180559).
• CVE-2020-28374: Fixed a vulnerability caused by insufficient identifier checking in the LIO SCSI target code. This could have been used by a remote attackers to read or write files via directory traversal in an XCOPY request (bnc#1178372).

The following non-security bugs were fixed:

• ACPI/IORT: Do not blindly trust DMA masks from firmware (git-fixes).
• ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI (git-fixes).
• ACPI: scan: Harden acpi_device_add() against device ID overflows (git-fixes).
• ACPI: scan: Make acpi_bus_get_device() clear return pointer on error (git-fixes).
• ACPI: sysfs: Prefer 'compatible' modalias (git-fixes).
• ALSA: doc: Fix reference to mixart.rst (git-fixes).
• ALSA: fireface: Fix integer overflow in transmit_midi_msg() (git-fixes).
• ALSA: firewire-tascam: Fix integer overflow in midi_port_work() (git-fixes).
• ALSA: hda: Add Cometlake-R PCI ID (git-fixes).
• ALSA: hda/conexant: add a new hda codec CX11970 (git-fixes).
• ALSA: hda/hdmi - enable runtime pm for CI AMD display audio (git-fixes).
• ALSA: hda/realtek: Add mute LED quirk for more HP laptops (git-fixes).
• ALSA: hda/realtek: Add two 'Intel Reference board' SSID in the ALC256 (git-fixes).
• ALSA: hda/realtek: Enable headset of ASUS B1400CEPE with ALC256 (git-fixes).
• ALSA: hda/realtek: Enable mute and micmute LED on HP EliteBook 850 G7 (git-fixes).
• ALSA: hda/realtek: fix right sounds and mute/micmute LEDs for HP machines (git-fixes).
• ALSA: hda/realtek - Fix speaker volume control on Lenovo C940 (git-fixes).
• ALSA: hda/realtek - Limit int mic boost on Acer Aspire E5-575T (git-fixes).
• ALSA: hda/realtek - Modify Dell platform name (git-fixes).
• ALSA: hda/realtek: Remove dummy lineout on Acer TravelMate P648/P658 (git-fixes).
• ALSA: hda/realtek - Supported Dell fixed type headset (git-fixes).
• ALSA: hda/tegra: fix tegra-hda on tegra30 soc (git-fixes).
• ALSA: hda/via: Add minimum mute flag (git-fixes).
• ALSA: hda/via: Apply the workaround generically for Clevo machines (git-fixes).
• ALSA: hda/via: Fix runtime PM for Clevo W35xSS (git-fixes).
• ALSA: pcm: Clear the full allocated memory at hw_params…

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

The following security bugs were fixed:

• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).
• CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required. (bnc#1180812)
• CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).
• CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-36158: Fixed an issue wich might have allowed a remote attackers to execute arbitrary code via a long SSID value in mwifiex_cmd_802_11_ad_hoc_start() (bnc#1180559).
• CVE-2020-28374: Fixed a vulnerability caused by insufficient identifier checking in the LIO SCSI target code. This could have been used by a remote attackers to read or write files via directory traversal in an XCOPY request (bnc#1178372).

The following non-security bugs were fixed:

• ACPICA: Disassembler: create buffer fields in ACPI_PARSE_LOAD_PASS1 (git-fixes).
• ACPICA: Do not increment operation_region reference counts for field units (git-fixes).
• ACPI: PNP: compare the string length in the matching_id() (git-fixes).
• ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI (git-fixes).
• ACPI: scan: Harden acpi_device_add() against device ID overflows (git-fixes).
• ACPI: scan: Make acpi_bus_get_device() clear return pointer on error (git-fixes).
• ALSA: ca0106: fix error code handling (git-fixes).
• ALSA: ctl: allow TLV read operation for callback type of element in locked case (git-fixes).
• ALSA: doc: Fix reference to mixart.rst (git-fixes).
• ALSA: fireface: Fix integer overflow in transmit_midi_msg() (git-fixes).
• ALSA: firewire-tascam: Fix integer overflow in midi_port_work() (git-fixes).
• ALSA: hda: Add NVIDIA codec IDs 9a & 9d through a0 to patch table (git-fixes).
• ALSA: hda: Fix potential race in unsol event handler (git-fixes).
• ALSA: hda - Fix silent audio output and corrupted input on MSI X570-A PRO (git-fixes).
• ALSA: hda/generic: Add option to enforce preferred_dacs pairs (git-fixes).
• ALSA: hda/hdmi: always check pin power status in i915 pin fixup (git-fixes).
• ALSA: hda/realtek - Couldn't detect Mic if booting with headset plugged (git-fixes).
• ALSA: hda/realtek: Enable front panel headset LED on Lenovo ThinkStation P520 (git-fixes).
• ALSA: hda/realtek - Enable headset mic of ASUS Q524UQK with ALC255 (git-fixes).
• ALSA: hda/via: Add minimum mute flag (git-fixes).
• ALSA: hda/via: Fix runtime PM for Clevo W35xSS (git-fixes).
• ALSA: info: Drop WARN_ON() from buffer NULL sanity check (git-fixes).
• ALSA: isa/wavefront: prevent out of bounds write in ioctl (git-fixes).
• ALSA: line6: Perform sanity check for each URB creation (git-fixes).
• ALSA: pcm: Clear the full allocated memory at hw_params (git-fixes).
• ALSA: pcm: oss: Fix a few more UBSAN fixes (git-fixes).
• ALSA: pcm: oss: Fix potential out-of-bounds shift (git-fixes).
• ALSA: pcm: oss: Remove superfluous WARN_ON() for mulaw sanity check (git-fixes).
• ALSA: seq: oss: Fix missing error check in snd_seq_oss_synth_make_info() (git-fixes).
• ALSA: timer: Limit max amount of slave instances (git-fixes).
• ALSA: usb-audio: Add delay quirk for all…

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

The following security bugs were fixed:

• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).
• CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required. (bnc#1180812)
• CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).
• CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).

The following non-security bugs were fixed:

• ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI (git-fixes).
• ACPI: scan: Harden acpi_device_add() against device ID overflows (git-fixes).
• ACPI: scan: Make acpi_bus_get_device() clear return pointer on error (git-fixes).
• ALSA: doc: Fix reference to mixart.rst (git-fixes).
• ALSA: fireface: Fix integer overflow in transmit_midi_msg() (git-fixes).
• ALSA: firewire-tascam: Fix integer overflow in midi_port_work() (git-fixes).
• ALSA: hda/via: Add minimum mute flag (git-fixes).
• ALSA: hda/via: Fix runtime PM for Clevo W35xSS (git-fixes).
• ALSA: pcm: Clear the full allocated memory at hw_params (git-fixes).
• ALSA: seq: oss: Fix missing error check in snd_seq_oss_synth_make_info() (git-fixes).
• arm64: pgtable: Ensure dirty bit is preserved across pte_wrprotect() (bsc#1180130).
• arm64: pgtable: Fix pte_accessible() (bsc#1180130).
• ASoC: dapm: remove widget from dirty list on free (git-fixes).
• ASoC: Intel: haswell: Add missing pm_ops (git-fixes).
• bnxt_en: Do not query FW when netif_running() is false (bsc#1086282).
• bnxt_en: Fix accumulation of bp->net_stats_prev (bsc#1104745 ).
• bnxt_en: fix error return code in bnxt_init_board() (git-fixes).
• bnxt_en: fix error return code in bnxt_init_one() (bsc#1050242 ).
• bnxt_en: fix HWRM error when querying VF temperature (bsc#1104745).
• bnxt_en: Improve stats context resource accounting with RDMA driver loaded (bsc#1104745).
• bnxt_en: read EEPROM A2h address using page 0 (git-fixes).
• bnxt_en: Release PCI regions when DMA mask setup fails during probe (git-fixes).
• bnxt_en: Reset rings if ring reservation fails during open() (bsc#1086282).
• bnxt_en: return proper error codes in bnxt_show_temp (bsc#1104745).
• bonding: set dev->needed_headroom in bond_setup_by_slave() (git-fixes).
• btrfs: add a flags argument to LOGICAL_INO and call it LOGICAL_INO_V2 (bsc#1174206).
• btrfs: add a flag to iterate_inodes_from_logical to find all
• btrfs: add a flag to iterate_inodes_from_logical to find all extent refs for uncompressed extents (bsc#1174206).
• btrfs: add a flag to iterate_inodes_from_logical to find all extent refs for uncompressed extents (bsc#1174206).
• btrfs: increase output size for LOGICAL_INO_V2 ioctl (bsc#1174206).
• btrfs: qgroup: do not try to wait flushing if we're already holding a transaction (bsc#1179575).
• caif: no need to check return value of debugfs_create functions (git-fixes).
• can: c_can: c_can_power_up(): fix error handling (git-fixes).
• can: dev:…

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

The following security bugs were fixed:

• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2021-3348: Fixed a use-after-free in nbd_add_socket that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup (bnc#1181504).
• CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).
• CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required. (bnc#1180812)
• CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).
• CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).

The following non-security bugs were fixed:

• ACPI/IORT: Do not blindly trust DMA masks from firmware (git-fixes).
• ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI (git-fixes).
• ACPI: scan: Harden acpi_device_add() against device ID overflows (git-fixes).
• ACPI: scan: Make acpi_bus_get_device() clear return pointer on error (git-fixes).
• ACPI: sysfs: Prefer 'compatible' modalias (git-fixes).
• ALSA: doc: Fix reference to mixart.rst (git-fixes).
• ALSA: fireface: Fix integer overflow in transmit_midi_msg() (git-fixes).
• ALSA: firewire-tascam: Fix integer overflow in midi_port_work() (git-fixes).
• ALSA: hda: Add Cometlake-R PCI ID (git-fixes).
• ALSA: hda/conexant: add a new hda codec CX11970 (git-fixes).
• ALSA: hda/hdmi - enable runtime pm for CI AMD display audio (git-fixes).
• ALSA: hda/realtek: Add mute LED quirk for more HP laptops (git-fixes).
• ALSA: hda/realtek: Add two 'Intel Reference board' SSID in the ALC256 (git-fixes).
• ALSA: hda/realtek: Enable headset of ASUS B1400CEPE with ALC256 (git-fixes).
• ALSA: hda/realtek: Enable mute and micmute LED on HP EliteBook 850 G7 (git-fixes).
• ALSA: hda/realtek: fix right sounds and mute/micmute LEDs for HP machines (git-fixes).
• ALSA: hda/realtek - Fix speaker volume control on Lenovo C940 (git-fixes).
• ALSA: hda/realtek - Limit int mic boost on Acer Aspire E5-575T (git-fixes).
• ALSA: hda/realtek - Modify Dell platform name (git-fixes).
• ALSA: hda/realtek: Remove dummy lineout on Acer TravelMate P648/P658 (git-fixes).
• ALSA: hda/realtek - Supported Dell fixed type headset (git-fixes).
• ALSA: hda/tegra: fix tegra-hda on tegra30 soc (git-fixes).
• ALSA: hda/via: Add minimum mute flag (git-fixes).
• ALSA: hda/via: Apply the workaround generically for Clevo machines (git-fixes).
• ALSA: hda/via: Fix runtime PM for Clevo W35xSS (git-fixes).
• ALSA: pcm: Clear the full allocated memory at hw_params (git-fixes).
• ALSA: pcm: fix hw_rule deps kABI (bsc#1181014).
• ALSA: pcm: One more dependency for hw constraints (bsc#1181014).
• ALSA: seq: oss: Fix missing error check in snd_seq_oss_synth_make_info() (git-fixes).
• ALSA: usb-audio: Add quirk for BOSS AD-10 (git-fixes).
• ALSA: usb-audio: Add quirk for RC-505 (git-fixes).
• ALSA: usb-audio: Always apply the hw constraints for implicit fb sync (bsc#1181014).
• ALSA:…

This update for the Linux Kernel 5.3.18-24_46 fixes several issues.

The following security issues were fixed:

• CVE-2020-29373: Fixed an issue where kernel unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations (bsc#1179779).
• CVE-2020-29569: Fixed a use after free due to a logic error (bsc#1180008).
• CVE-2020-29368: Fixed an issue in copy-on-write implementation which could grant unintended write access because of a race condition in a THP mapcount check (bsc#1179664).

This update for the Linux Kernel 5.3.18-24_24 fixes several issues.

The following security issues were fixed:

• CVE-2020-29373: Fixed an issue where kernel unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations (bsc#1179779).
• CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180562).
• CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180032.
• CVE-2020-29569: Fixed a use after free due to a logic error (bsc#1180008).
• CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bsc#1179877).
• CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179877).
• CVE-2020-29368: Fixed an issue in copy-on-write implementation which could grant unintended write access because of a race condition in a THP mapcount check (bsc#1179664).

This update for the Linux Kernel 5.3.18-22 fixes several issues.

The following security issues were fixed:

• CVE-2020-29373: Fixed an issue where kernel unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations (bsc#1179779).
• CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180562).
• CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180030).
• CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180032.
• CVE-2020-29569: Fixed a use after free due to a logic error (bsc#1180008).
• CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bsc#1179877).
• CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179877).
• CVE-2020-29368: Fixed an issue in copy-on-write implementation which could grant unintended write access because of a race condition in a THP mapcount check (bsc#1179664).

This update for the Linux Kernel 4.12.14-197_34 fixes several issues.

The following security issues were fixed:

• CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180562).
• CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180030).
• CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180032.
• CVE-2020-29569: Fixed a use after free due to a logic error (bsc#1180008).
• CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bsc#1179877).
• CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179877).
• CVE-2020-29368: Fixed an issue in copy-on-write implementation which could grant unintended write access because of a race condition in a THP mapcount check (bsc#1179664).

This update for the Linux Kernel 4.12.14-197_78 fixes several issues.

The following security issues were fixed:

• CVE-2020-29569: Fixed a use after free due to a logic error (bsc#1180008).
• CVE-2020-29368: Fixed an issue in copy-on-write implementation which could grant unintended write access because of a race condition in a THP mapcount check (bsc#1179664).

This update for the Linux Kernel 4.4.180-94_116 fixes several issues.

The following security issues were fixed:

• CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180562).
• CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180030).
• CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180032.
• CVE-2020-29569: Fixed a use after free due to a logic error (bsc#1180008).
• CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bsc#1179877).
• CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179877).

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

The following security bugs were fixed:

• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2021-3348: Fixed a use-after-free in nbd_add_socket that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup (bnc#1181504).
• CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).
• CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required. (bnc#1180812)
• CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).
• CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).
• CVE-2020-28374: Fixed a Linux SCSI target issue (bsc#1178372).

The following non-security bugs were fixed:

• ACPI/IORT: Do not blindly trust DMA masks from firmware (git-fixes).
• ACPI: scan: Harden acpi_device_add() against device ID overflows (git-fixes).
• ACPI: scan: Make acpi_bus_get_device() clear return pointer on error (git-fixes).
• ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI (git-fixes).
• ACPI: sysfs: Prefer 'compatible' modalias (git-fixes).
• ALSA: doc: Fix reference to mixart.rst (git-fixes).
• ALSA: fireface: Fix integer overflow in transmit_midi_msg() (git-fixes).
• ALSA: firewire-tascam: Fix integer overflow in midi_port_work() (git-fixes).
• ALSA: hda/conexant: add a new hda codec CX11970 (git-fixes).
• ALSA: hda/hdmi - enable runtime pm for CI AMD display audio (git-fixes).
• ALSA: hda/realtek - Fix speaker volume control on Lenovo C940 (git-fixes).
• ALSA: hda/realtek - Limit int mic boost on Acer Aspire E5-575T (git-fixes).
• ALSA: hda/realtek - Modify Dell platform name (git-fixes).
• ALSA: hda/realtek - Supported Dell fixed type headset (git-fixes).
• ALSA: hda/realtek: Add mute LED quirk for more HP laptops (git-fixes).
• ALSA: hda/realtek: Add two 'Intel Reference board' SSID in the ALC256 (git-fixes).
• ALSA: hda/realtek: Enable headset of ASUS B1400CEPE with ALC256 (git-fixes).
• ALSA: hda/realtek: Enable mute and micmute LED on HP EliteBook 850 G7 (git-fixes).
• ALSA: hda/realtek: Remove dummy lineout on Acer TravelMate P648/P658 (git-fixes).
• ALSA: hda/realtek: fix right sounds and mute/micmute LEDs for HP machines (git-fixes).
• ALSA: hda/tegra: fix tegra-hda on tegra30 soc (git-fixes).
• ALSA: hda/via: Add minimum mute flag (git-fixes).
• ALSA: hda/via: Apply the workaround generically for Clevo machines (git-fixes).
• ALSA: hda/via: Fix runtime PM for Clevo W35xSS (git-fixes).
• ALSA: hda: Add Cometlake-R PCI ID (git-fixes).
• ALSA: pcm: Clear the full allocated memory at hw_params (git-fixes).
• ALSA: pcm: One more dependency for hw constraints (bsc#1181014).
• ALSA: pcm: fix hw_rule deps kABI (bsc#1181014).
• ALSA: seq: oss: Fix missing error check in snd_seq_oss_synth_make_info() (git-fixes).
• ALSA: usb-audio: Add quirk for BOSS AD-10 (git-fixes).
• ALSA: usb-audio: Add quirk for RC-505 (git-fixes).
• ALSA: usb-audio:…

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

The following security bugs were fixed:

• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2021-3348: Fixed a use-after-free in nbd_add_socket that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup (bnc#1181504).
• CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).
• CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required. (bnc#1180812)
• CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).
• CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-28374: Fixed a Linux SCSI target issue (bsc#1178372).
• CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180559).

The following non-security bugs were fixed:

• ACPI: PNP: compare the string length in the matching_id() (git-fixes).
• ACPI: scan: Harden acpi_device_add() against device ID overflows (git-fixes).
• ACPI: scan: Make acpi_bus_get_device() clear return pointer on error (git-fixes).
• ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI (git-fixes).
• ACPICA: Disassembler: create buffer fields in ACPI_PARSE_LOAD_PASS1 (git-fixes).
• ACPICA: Do not increment operation_region reference counts for field units (git-fixes).
• ALSA: ca0106: fix error code handling (git-fixes).
• ALSA: ctl: allow TLV read operation for callback type of element in locked case (git-fixes).
• ALSA: doc: Fix reference to mixart.rst (git-fixes).
• ALSA: fireface: Fix integer overflow in transmit_midi_msg() (git-fixes).
• ALSA: firewire-tascam: Fix integer overflow in midi_port_work() (git-fixes).
• ALSA: hda - Fix silent audio output and corrupted input on MSI X570-A PRO (git-fixes).
• ALSA: hda/generic: Add option to enforce preferred_dacs pairs (git-fixes).
• ALSA: hda/hdmi: always check pin power status in i915 pin fixup (git-fixes).
• ALSA: hda/realtek - Couldn't detect Mic if booting with headset plugged (git-fixes).
• ALSA: hda/realtek - Enable headset mic of ASUS Q524UQK with ALC255 (git-fixes).
• ALSA: hda/realtek: Enable front panel headset LED on Lenovo ThinkStation P520 (git-fixes).
• ALSA: hda/via: Add minimum mute flag (git-fixes).
• ALSA: hda/via: Fix runtime PM for Clevo W35xSS (git-fixes).
• ALSA: hda: Add NVIDIA codec IDs 9a & 9d through a0 to patch table (git-fixes).
• ALSA: hda: Fix potential race in unsol event handler (git-fixes).
• ALSA: info: Drop WARN_ON() from buffer NULL sanity check (git-fixes).
• ALSA: isa/wavefront: prevent out of bounds write in ioctl (git-fixes).
• ALSA: line6: Perform sanity check for each URB creation (git-fixes).
• ALSA: pcm: Clear the full allocated memory at hw_params (git-fixes).
• ALSA: pcm: oss: Fix a few more UBSAN fixes (git-fixes).
• ALSA: pcm: oss: Fix potential out-of-bounds shift (git-fixes).
• ALSA: pcm: oss: Remove superfluous WARN_ON() for mulaw sanity check (git-fixes).
• ALSA: seq: oss: Fix missing error check in snd_seq_oss_synth_make_info() (git-fixes).
• ALSA: timer: Limit max amount of slave instances (git-fixes).
• ALSA: usb-audio: Add delay quirk for H570e USB headsets (git-fixes).
• ALSA: usb-audio: Add…

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

The following security bugs were fixed:

• CVE-2021-3348: Fixed a use-after-free in nbd_add_socket() that could be triggered by local attackers (with access to the nbd device) via an I/O request (bnc#1181504).
• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).
• CVE-2020-25211: Fixed a buffer overflow in ctnetlink_parse_tuple_filter() which could be triggered by a local attackers by injecting conntrack netlink configuration (bnc#1176395).
• CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-0444: Fixed a bad kfree due to a logic error in audit_data_to_entry (bnc#1180027).
• CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180029).
• CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180031).
• CVE-2020-4788: Fixed an issue with IBM Power9 processors could have allowed a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances (bsc#1177666).
• CVE-2020-15436: Fixed a use after free vulnerability in fs/block_dev.c which could have allowed local users to gain privileges or cause a denial of service (bsc#1179141).
• CVE-2020-27068: Fixed an out-of-bounds read due to a missing bounds check in the nl80211_policy policy of nl80211.c (bnc#1180086).
• CVE-2020-27777: Fixed a privilege escalation in the Run-Time Abstraction Services (RTAS) interface, affecting guests running on top of PowerVM or KVM hypervisors (bnc#1179107).
• CVE-2020-27786: Fixed an out-of-bounds write in the MIDI implementation (bnc#1179601).
• CVE-2020-27825: Fixed a race in the trace_open and buffer resize calls (bsc#1179960).
• CVE-2020-29371: Fixed uninitialized memory leaks to userspace (bsc#1179429).
• CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bnc#1179745).
• CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179745).
• CVE-2020-28974: Fixed a slab-out-of-bounds read in fbcon which could have been used by local attackers to read privileged information or potentially crash the kernel (bsc#1178589).
• CVE-2020-28915: Fixed a buffer over-read in the fbcon code which could have been used by local attackers to read kernel memory (bsc#1178886).
• CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182).
• CVE-2020-15437: Fixed a null pointer dereference which could have allowed local users to cause a denial of service(bsc#1179140).
• CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180559).
• CVE-2020-28374: Fixed a Linux SCSI target issue (bsc#1178372).
• CVE-2019-20934: Fixed a use-after-free in show_numa_stats() because NUMA fault statistics were inappropriately freed (bsc#1179663).

The following non-security bugs were fixed:

• blk-mq: improve heavily contended tag case (bsc#1178198).
• debugfs_lookup(): switch to lookup_one_len_unlocked() (bsc#1171979).
• epoll: Keep a reference on files added to the check list (bsc#1180031).
• fix regression in 'epoll: Keep a reference on files added to the check list' (bsc#1180031, git-fixes).
• futex: Do not enable IRQs…

The SUSE Linux Enterprise 12 SP2 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).
• CVE-2020-0444: Fixed a bad kfree due to a logic error in audit_data_to_entry (bnc#1180027).
• CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180029).
• CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180031).
• CVE-2020-15436: Fixed a use after free vulnerability in fs/block_dev.c which could have allowed local users to gain privileges or cause a denial of service (bsc#1179141).
• CVE-2020-27068: Fixed an out-of-bounds read due to a missing bounds check in the nl80211_policy policy of nl80211.c (bnc#1180086).
• CVE-2020-27777: Fixed a privilege escalation in the Run-Time Abstraction Services (RTAS) interface, affecting guests running on top of PowerVM or KVM hypervisors (bnc#1179107).
• CVE-2020-27786: Fixed an out-of-bounds write in the MIDI implementation (bnc#1179601).
• CVE-2020-27825: Fixed a race in the trace_open and buffer resize calls (bsc#1179960).
• CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bnc#1179745).
• CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179745).
• CVE-2020-28974: Fixed a slab-out-of-bounds read in fbcon which could have been used by local attackers to read privileged information or potentially crash the kernel (bsc#1178589).
• CVE-2020-28915: Fixed a buffer over-read in the fbcon code which could have been used by local attackers to read kernel memory (bsc#1178886).
• CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182).
• CVE-2020-25285: A race condition between hugetlb sysctl handlers in mm/hugetlb.c could be used by local attackers to corrupt memory, cause a NULL pointer dereference, or possibly have unspecified other impact (bnc#1176485 ).
• CVE-2020-15437: Fixed a null pointer dereference which could have allowed local users to cause a denial of service (bsc#1179140).
• CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180559).
• CVE-2020-11668: Fixed the mishandling of invalid descriptors in the Xirlink camera USB driver (bnc#1168952).
• CVE-2020-25668: Fixed a use-after-free in con_font_op() (bsc#1178123).
• CVE-2020-27673: Fixed an issue where rogue guests could have caused denial of service of Dom0 via high frequency events (XSA-332 bsc#1177411)
• CVE-2019-20934: Fixed a use-after-free in show_numa_stats() because NUMA fault statistics were inappropriately freed (bsc#1179663).
• CVE-2019-19063: Fixed two memory leaks in the rtl_usb_probe() which could eventually have allowed attackers to cause a denial of service (memory consumption) (bnc#1157298 ).
• CVE-2019-6133: Fixed an issue where the 'start time' protection mechanism could have been bypassed and therefore authorization decisions are improperly cached (bsc#1128172).

The following non-security bugs were fixed:

• HID: Fix slab-out-of-bounds read in hid_field_extract (bsc#1180052).
• epoll: Keep a reference on files added to the check list (bsc#1180031).
• fix regression in 'epoll: Keep a reference…

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

The following security bugs were fixed:

• CVE-2021-3348: Fixed a use-after-free in nbd_add_socket that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup (bnc#1181504).
• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2020-25211: Fixed a buffer overflow in ctnetlink_parse_tuple_filter() which could be triggered by a local attackers by injecting conntrack netlink configuration (bnc#1176395).
• CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-0444: Fixed a bad kfree due to a logic error in audit_data_to_entry (bnc#1180027).
• CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180029).
• CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180031).
• CVE-2020-4788: Fixed an issue with IBM Power9 processors could have allowed a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances (bsc#1177666).
• CVE-2020-10781: A flaw was found in the ZRAM kernel module, where a user with a local account and the ability to read the /sys/class/zram-control/hot_add file can create ZRAM device nodes in the /dev/ directory. This read allocates kernel memory and is not accounted for a user that triggers the creation of that ZRAM device. With this vulnerability, continually reading the device may consume a large amount of system memory and cause the Out-of-Memory (OOM) killer to activate and terminate random userspace processes, possibly making the system inoperable (bnc#1173074).
• CVE-2020-15436: Fixed a use after free vulnerability in fs/block_dev.c which could have allowed local users to gain privileges or cause a denial of service (bsc#1179141).
• CVE-2020-27068: Fixed an out-of-bounds read due to a missing bounds check in the nl80211_policy policy of nl80211.c (bnc#1180086).
• CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).
• CVE-2020-27777: Fixed a privilege escalation in the Run-Time Abstraction Services (RTAS) interface, affecting guests running on top of PowerVM or KVM hypervisors (bnc#1179107).
• CVE-2020-27786: Fixed an out-of-bounds write in the MIDI implementation (bnc#1179601).
• CVE-2020-27825: Fixed a race in the trace_open and buffer resize calls (bsc#1179960).
• CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bnc#1179745).
• CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179745).
• CVE-2020-28974: Fixed a slab-out-of-bounds read in fbcon which could have been used by local attackers to read privileged information or potentially crash the kernel (bsc#1178589).
• CVE-2020-28915: Fixed a buffer over-read in the fbcon code which could have been used by local attackers to read kernel memory (bsc#1178886).
• CVE-2020-28374: Fixed a Linux SCSI target issue (bsc#1178372).
• CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182).
• CVE-2020-29371: An issue was discovered in romfs_dev_read in fs/romfs/storage.c where uninitialized memory leaks to userspace (bnc#1179429).
• CVE-2020-15437: Fixed a null pointer dereference which could have allowed local…

The SUSE Linux Enterprise 12 SP3 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2020-25211: Fixed a buffer overflow in ctnetlink_parse_tuple_filter() which could be triggered by a local attackers by injecting conntrack netlink configuration (bnc#1176395).
• CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).
• CVE-2020-0444: Fixed a bad kfree due to a logic error in audit_data_to_entry (bnc#1180027).
• CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180029).
• CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180031).
• CVE-2020-4788: Fixed an issue with IBM Power9 processors could have allowed a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances (bsc#1177666).
• CVE-2020-15436: Fixed a use after free vulnerability in fs/block_dev.c which could have allowed local users to gain privileges or cause a denial of service (bsc#1179141).
• CVE-2020-27068: Fixed an out-of-bounds read due to a missing bounds check in the nl80211_policy policy of nl80211.c (bnc#1180086).
• CVE-2020-27777: Fixed a privilege escalation in the Run-Time Abstraction Services (RTAS) interface, affecting guests running on top of PowerVM or KVM hypervisors (bnc#1179107).
• CVE-2020-27786: Fixed an out-of-bounds write in the MIDI implementation (bnc#1179601).
• CVE-2020-27825: Fixed a race in the trace_open and buffer resize calls (bsc#1179960).
• CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bnc#1179745).
• CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179745).
• CVE-2020-28974: Fixed a slab-out-of-bounds read in fbcon which could have been used by local attackers to read privileged information or potentially crash the kernel (bsc#1178589).
• CVE-2020-28915: Fixed a buffer over-read in the fbcon code which could have been used by local attackers to read kernel memory (bsc#1178886).
• CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182).
• CVE-2020-15437: Fixed a null pointer dereference which could have allowed local users to cause a denial of service(bsc#1179140).
• CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180559).
• CVE-2020-11668: Fixed the mishandling of invalid descriptors in the Xirlink camera USB driver (bnc#1168952).
• CVE-2020-25285: Fixed a race condition between hugetlb sysctl handlers in mm/hugetlb.c (bnc#1176485).
• CVE-2019-20934: Fixed a use-after-free in show_numa_stats() because NUMA fault statistics were inappropriately freed (bsc#1179663).
• CVE-2018-10902: It was found that the raw midi kernel driver did not protect against concurrent access which leads to a double realloc (double free) in snd_rawmidi_input_params() and snd_rawmidi_output_status() which are part of snd_rawmidi_ioctl() handler in rawmidi.c file. A malicious local attacker could possibly use this for privilege escalation (bnc#1105322).

The following non-security bugs were fixed:

• cifs: do not revalidate mountpoint dentries (bsc#1177440).
• cifs: fix potential use-after-free in cifs_echo_request() (bsc#1139944).
• cifs: ignore…

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

The following security bugs were fixed:

• CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).
• CVE-2021-3348: Fixed a use-after-free in nbd_add_socket that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup (bnc#1181504).
• CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).
• CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required. (bnc#1180812)
• CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).
• CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).
• CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).
• CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).

The following non-security bugs were fixed:

• ACPI: scan: Harden acpi_device_add() against device ID overflows (git-fixes).
• ACPI: scan: Make acpi_bus_get_device() clear return pointer on error (git-fixes).
• ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI (git-fixes).
• ALSA: doc: Fix reference to mixart.rst (git-fixes).
• ALSA: fireface: Fix integer overflow in transmit_midi_msg() (git-fixes).
• ALSA: firewire-tascam: Fix integer overflow in midi_port_work() (git-fixes).
• ALSA: hda/via: Add minimum mute flag (git-fixes).
• ALSA: hda/via: Fix runtime PM for Clevo W35xSS (git-fixes).
• ALSA: pcm: Clear the full allocated memory at hw_params (git-fixes).
• ALSA: seq: oss: Fix missing error check in snd_seq_oss_synth_make_info() (git-fixes).
• ASoC: Intel: haswell: Add missing pm_ops (git-fixes).
• ASoC: dapm: remove widget from dirty list on free (git-fixes).
• EDAC/amd64: Fix PCI component registration (bsc#1112178).
• IB/mlx5: Fix DEVX support for MLX5_CMD_OP_INIT2INIT_QP command (bsc#1103991).
• KVM: SVM: Initialize prev_ga_tag before use (bsc#1180912).
• KVM: x86/mmu: Commit zap of remaining invalid pages when recovering lpages (bsc#1181230).
• NFS4: Fix use-after-free in trace_event_raw_event_nfs4_set_lock (git-fixes).
• NFS: nfs_igrab_and_active must first reference the superblock (git-fixes).
• NFS: switch nfsiod to be an UNBOUND workqueue (git-fixes).
• NFSv4.2: condition READDIR's mask for security label based on LSM state (git-fixes).
• RDMA/addr: Fix race with netevent_callback()/rdma_addr_cancel() (bsc#1103992).
• RDMA/bnxt_re: Do not add user qps to flushlist (bsc#1050244 ).
• RDMA/bnxt_re: Do not report transparent vlan from QP1 (bsc#1104742).
• RDMA/cma: Do not overwrite sgid_attr after device is released (bsc#1103992).
• RDMA/core: Ensure security pkey modify is not lost (bsc#1046306 ).
• RDMA/core: Fix pkey and port assignment in get_new_pps (bsc#1046306).
• RDMA/core: Fix protection fault in get_pkey_idx_qp_list (bsc#1046306).
• RDMA/core: Fix reported speed and width (bsc#1046306 ).
• RDMA/core: Fix return error value in _ib_modify_qp() to negative (bsc#1103992).
• RDMA/core: Fix use of logical OR in get_new_pps (bsc#1046306 ).
• RDMA/hns: Bugfix for memory window mtpt configuration (bsc#1104427).
• RDMA/hns: Bugfix for slab-out-of-bounds when unloading hip08 driver (bsc#1104427).
• RDMA/hns: Fix cmdq parameter of querying pf timer resource (bsc#1104427 bsc#1126206).
• RDMA/hns: Fix missing sq_sig_type when querying QP (bsc#1104427 ).
• RDMA/hns: bugfix for slab-out-of-bounds when…

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…

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)

It was discovered that the Marvell WiFi-Ex device driver in the Linux kernel did not properly validate ad-hoc SSIDs. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-36158)

吴异 discovered that the NFS implementation in the Linux kernel did not properly prevent access outside of an NFS export that is a subdirectory of a file system. An attacker could possibly use this to bypass NFS access restrictions. (CVE-2021-3178)