CVE-2020-36766

An issue was discovered in the Linux kernel before 5.8.6. drivers/media/cec/core/cec-api.c leaks one byte of kernel memory on specific hardware to unprivileged users, because of directly assigning log_addrs with a hole in the struct.

The Linux Kernel, the operating system core itself.

Security Fix(es):

An issue was discovered in the Linux kernel before 5.8.6. drivers/media/cec/core/cec-api.c leaks one byte of kernel memory on specific hardware to unprivileged users, because of directly assigning log_addrs with a hole in the struct.(CVE-2020-36766)

An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the h->nets array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.(CVE-2023-42753)

The Linux Kernel, the operating system core itself.

Security Fix(es):

An issue was discovered in the Linux kernel before 5.8.6. drivers/media/cec/core/cec-api.c leaks one byte of kernel memory on specific hardware to unprivileged users, because of directly assigning log_addrs with a hole in the struct.(CVE-2020-36766)

An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the h->nets array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.(CVE-2023-42753)

An issue was discovered in the Linux kernel before 5.8.6. drivers/media/cec/core/cec-api.c leaks one byte of kernel memory on specific hardware to unprivileged users, because of directly assigning log_addrs with a hole in the struct.

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

The following security bugs were fixed:

• CVE-2023-4389: Fixed a reference counting issue in the Btrfs filesystem that could be exploited in order to leak internal kernel information or crash the system (bsc#1214351).
• CVE-2023-42753: Fixed an array indexing vulnerability in the netfilter subsystem. This issue may have allowed a local user to crash the system or potentially escalate their privileges (bsc#1215150).
• CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup table which could be exploited by network adjacent attackers, increasing CPU usage by 95% (bsc#1212703).
• CVE-2023-4921: Fixed a use-after-free vulnerability in the QFQ network scheduler which could be exploited to achieve local privilege escalatio (bsc#1215275).
• CVE-2023-23454: Fixed a type-confusion in the CBQ network scheduler (bsc#1207036).
• CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain sockets component which could be exploited to achieve local privilege escalation (bsc#1215117).
• CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215115).
• CVE-2020-36766: Fixed a potential information leak in in the CEC driver (bsc#1215299).
• CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs which could be exploited to crash the system (bsc#1210169).
• CVE-2023-2177: Fixed a null pointer dereference issue in the sctp network protocol which could allow a user to crash the system (bsc#1210643).
• CVE-2023-4881: Fixed an out-of-bounds write flaw in the netfilter subsystem that could lead to information disclosure or denial of service (bsc#1215221).
• CVE-2023-40283: Fixed a use-after-free issue in the Bluetooth subsystem (bsc#1214233).
• CVE-2023-1192: Fixed a use-after-free in the CIFS subsystem (bsc#1208995).

The following non-security bugs were fixed:

• check-for-config-changes: ignore BUILTIN_RETURN_ADDRESS_STRIPS_PAC (bsc#1214380).
• mkspec: Allow unsupported KMPs (bsc#1214386)
• rpm/mkspec-dtb: support for nested subdirs.
• x86/srso: Do not probe microcode in a guest (git-fixes).
• x86/srso: Fix SBPB enablement for spec_rstack_overflow=off (git-fixes).
• x86/srso: Fix srso_show_state() side effect (git-fixes).
• x86/srso: Set CPUID feature bits independently of bug or mitigation status (git-fixes).

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

The following security bugs were fixed:

• CVE-2023-39192: Fixed an out of bounds read in the netfilter (bsc#1215858).
• CVE-2023-39193: Fixed an out of bounds read in the xtables subsystem (bsc#1215860).
• CVE-2023-39194: Fixed an out of bounds read in the XFRM subsystem (bsc#1215861).
• CVE-2023-42754: Fixed a NULL pointer dereference in the IPv4 stack that could lead to denial of service (bsc#1215467).
• CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup table which could be exploited by network adjacent attackers, increasing CPU usage by 95% (bsc#1212703).
• CVE-2023-4921: Fixed a use-after-free vulnerability in the QFQ network scheduler which could be exploited to achieve local privilege escalation (bsc#1215275).
• CVE-2023-0394: Fixed a NULL pointer dereference in the IPv6 stack that could lead to denial of service (bsc#1207168).
• CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain sockets component which could be exploited to achieve local privilege escalation (bsc#1215117).
• CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215115).
• CVE-2020-36766: Fixed a potential information leak in in the CEC driver (bsc#1215299).
• CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs which could be exploited to crash the system (bsc#1210169).
• CVE-2023-4881: Fixed a out-of-bounds write flaw in the netfilter subsystem that could lead to potential information disclosure or a denial of service (bsc#1215221).
• CVE-2023-1192: Fixed use-after-free in cifs_demultiplex_thread() (bsc#1208995).

The following non-security bugs were fixed:

• 9p/trans_virtio: Remove sysfs file on probe failure (git-fixes).
• Drivers: hv: vmbus: Do not dereference ACPI root object handle (git-fixes).
• Input: psmouse - fix OOB access in Elantech protocol (git-fixes).
• Input: raspberrypi-ts - fix refcount leak in rpi_ts_probe (git-fixes).
• Input: xpad - add constants for GIP interface numbers (git-fixes).
• Input: xpad - delete a Razer DeathAdder mouse VID/PID entry (git-fixes).
• KVM: s390: vsie: Fix the initialization of the epoch extension (epdx) field (git-fixes bsc#1215897).
• KVM: s390: vsie: fix the length of APCB bitmap (git-fixes bsc#1215898).
• NFS/pNFS: Report EINVAL errors from connect() to the server (git-fixes).
• NFSv4/pnfs: minor fix for cleanup path in nfs4_get_device_info (git-fixes).
• README: update rebuilding information (jsc#PED-5021).
• USB: serial: option: add FOXCONN T99W368/T99W373 product (git-fixes).
• USB: serial: option: add Quectel EM05G variant (0x030e) (git-fixes).
• VSOCK: handle VIRTIO_VSOCK_OP_CREDIT_REQUEST (git-fixes).
• arm64: insn: Fix ldadd instruction encoding (git-fixes)
• arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step (git-fixes)
• blacklist.conf: workqueue: compiler warning on 32-bit systems with Clang (bsc#1215877)
• blk-mq: Add blk_mq_delay_run_hw_queues() API call (bsc#1214586).
• blk-mq: In blk_mq_dispatch_rq_list() 'no budget' is a reason to kick (bsc#1214586).
• blk-mq: Rerun dispatching in the case of budget contention (bsc#1214586).
• btrfs: output extra debug info on failure (bsc#1215136).
• config: do not incorrectly set CONFIG_BUILTIN_RETURN_ADDRESS_STRIPS_PAC (bsc#1214380).
• direct-io: allow direct writes to empty inodes (bsc#1215164).
• drm/ast: Fix DRAM init on AST2200 (bsc#1152446)
• drm/client: Fix memory leak in drm_client_target_cloned (bsc#1152446).
• drm/client: Send hotplug event after registering a client (bsc#1152446).
• drm/virtio: Fix GEM handle creation UAF (git-fixes).
• drm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes (git-fixes).
• ext4: avoid deadlock in fs reclaim with page writeback (bsc#1213016).
• ext4: correct inline offset when handling xattrs in inode body (bsc#1214950).
• ext4: fix wrong unit use…

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

The following security bugs were fixed:

• CVE-2023-39194: Fixed a flaw in the processing of state filters which could allow a local attackers to disclose sensitive information. (bsc#1215861)
• CVE-2023-39193: Fixed a flaw in the processing of state filters which could allow a local attackers to disclose sensitive information. (bsc#1215860)
• CVE-2023-39192: Fixed a flaw in the u32_match_it function which could allow a local attackers to disclose sensitive information. (bsc#1215858)
• CVE-2023-42754: Fixed a null pointer dereference in ipv4_link_failure which could lead an authenticated attacker to trigger a DoS. (bsc#1215467)
• CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup table. A user located in the local network or with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up to 95% (bsc#1212703).
• CVE-2023-4921: Fixed a use-after-free vulnerability in the QFQ network scheduler which could be exploited to achieve local privilege escalatio (bsc#1215275).
• CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain sockets component which could be exploited to achieve local privilege escalation (bsc#1215117).
• CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215115).
• CVE-2020-36766: Fixed a potential information leak in in the CEC driver (bsc#1215299).
• CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs which could be exploited to crash the system (bsc#1210169).
• CVE-2023-4881: Fixed a out-of-bounds write flaw in the netfilter subsystem that could lead to potential information disclosure or a denial of service (bsc#1215221).
• CVE-2023-1192: Fixed use-after-free in cifs_demultiplex_thread() (bsc#1208995).

The following non-security bugs were fixed:

• 9p/trans_virtio: Remove sysfs file on probe failure (git-fixes).
• arm64: insn: Fix ldadd instruction encoding (git-fixes)
• arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step (git-fixes)
• blk-mq: Add blk_mq_delay_run_hw_queues() API call (bsc#1214586).
• blk-mq: In blk_mq_dispatch_rq_list() 'no budget' is a reason to kick (bsc#1214586).
• blk-mq: Rerun dispatching in the case of budget contention (bsc#1214586).
• check-for-config-changes: ignore BUILTIN_RETURN_ADDRESS_STRIPS_PAC (bsc#1214380). gcc7 on SLE 15 does not support this while later gcc does.
• direct-io: allow direct writes to empty inodes (bsc#1215164).
• Drivers: hv: vmbus: Do not dereference ACPI root object handle (git-fixes).
• drm/ast: Fix DRAM init on AST2200 (bsc#1152446)
• drm/client: Fix memory leak in drm_client_target_cloned (bsc#1152446) Backporting changes: * move changes to drm_fb_helper.c * context changes
• drm/client: Send hotplug event after registering a client (bsc#1152446) Backporting changes: * send hotplug event from drm_client_add() * remove drm_dbg_kms()
• drm/virtio: Fix GEM handle creation UAF (git-fixes).
• drm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes (git-fixes).
• ext4: avoid deadlock in fs reclaim with page writeback (bsc#1213016).
• ext4: correct inline offset when handling xattrs in inode body (bsc#1214950).
• ext4: fix wrong unit use in ext4_mb_clear_bb (bsc#1214943).
• ext4: set goal start correctly in ext4_mb_normalize_request (bsc#1214940).
• fbcon: Fix null-ptr-deref in soft_cursor (bsc#1154048)
• fbdev: au1200fb: Fix missing IRQ check in au1200fb_drv_probe (bsc#1154048)
• fbdev: imxfb: warn about invalid left/right margin (bsc#1154048)
• fbdev: modedb: Add 1920x1080 at 60 Hz video mode (bsc#1154048)
• fbdev: omapfb: lcd_mipid: Fix an error handling path in (bsc#1154048)
• firmware: raspberrypi: fix possible memory leak in rpi_firmware_probe() (git-fixes).
• firmware: raspberrypi: Introduce devm_rpi_firmware_get() (git-fixes).
• firmware:…

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

The following security bugs were fixed:

• CVE-2023-39194: Fixed an out of bounds read in the XFRM subsystem (bsc#1215861).
• CVE-2023-39193: Fixed an out of bounds read in the xtables subsystem (bsc#1215860).
• CVE-2023-39192: Fixed an out of bounds read in the netfilter subsystem (bsc#1215858).
• CVE-2023-42754: Fixed a NULL pointer dereference in the IPv4 stack that could lead to denial of service (bsc#1215467).
• CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup table which could be exploited by network adjacent attackers, increasing CPU usage by 95% (bsc#1212703).
• CVE-2023-4921: Fixed a use-after-free vulnerability in the QFQ network scheduler which could be exploited to achieve local privilege escalatio (bsc#1215275).
• CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain sockets component which could be exploited to achieve local privilege escalation (bsc#1215117).
• CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215115).
• CVE-2020-36766: Fixed a potential information leak in in the CEC driver (bsc#1215299).
• CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs which could be exploited to crash the system (bsc#1210169).
• CVE-2023-4881: Fixed a out-of-bounds write flaw in the netfilter subsystem that could lead to potential information disclosure or a denial of service (bsc#1215221).
• CVE-2023-1192: Fixed use-after-free in cifs_demultiplex_thread() (bsc#1208995).

The following non-security bugs were fixed:

• 9p/trans_virtio: Remove sysfs file on probe failure (git-fixes).
• Drivers: hv: vmbus: Do not dereference ACPI root object handle (git-fixes).
• Input: psmouse - fix OOB access in Elantech protocol (git-fixes).
• Input: raspberrypi-ts - fix refcount leak in rpi_ts_probe (git-fixes).
• Input: xpad - add constants for GIP interface numbers (git-fixes).
• Input: xpad - delete a Razer DeathAdder mouse VID/PID entry (git-fixes).
• KVM: s390: vsie: Fix the initialization of the epoch extension (epdx) field (git-fixes bsc#1215897).
• KVM: s390: vsie: fix the length of APCB bitmap (git-fixes bsc#1215898).
• NFS/pNFS: Report EINVAL errors from connect() to the server (git-fixes).
• NFSv4/pnfs: minor fix for cleanup path in nfs4_get_device_info (git-fixes).
• USB: serial: option: add FOXCONN T99W368/T99W373 product (git-fixes).
• USB: serial: option: add Quectel EM05G variant (0x030e) (git-fixes).
• VSOCK: handle VIRTIO_VSOCK_OP_CREDIT_REQUEST (git-fixes).
• arm64: insn: Fix ldadd instruction encoding (git-fixes)
• arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step (git-fixes)
• blacklist.conf: workqueue: compiler warning on 32-bit systems with Clang (bsc#1215877)
• blk-mq: Add blk_mq_delay_run_hw_queues() API call (bsc#1214586).
• blk-mq: In blk_mq_dispatch_rq_list() 'no budget' is a reason to kick (bsc#1214586).
• blk-mq: Rerun dispatching in the case of budget contention (bsc#1214586).
• btrfs: output extra information on failure (bsc#1215136).
• check-for-config-changes: ignore BUILTIN_RETURN_ADDRESS_STRIPS_PAC (bsc#1214380)
• direct-io: allow direct writes to empty inodes (bsc#1215164).
• drm/ast: Fix DRAM init on AST2200 (bsc#1152446)
• drm/client: Fix memory leak in drm_client_target_cloned (bsc#1152446) Backporting changes: * move changes to drm_fb_helper.c * context changes
• drm/client: Send hotplug event after registering a client (bsc#1152446) Backporting changes: * send hotplug event from drm_client_add() * remove drm_dbg_kms()
• drm/virtio: Fix GEM handle creation UAF (git-fixes).
• drm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes (git-fixes).
• ext4: avoid deadlock in fs reclaim with page writeback (bsc#1213016).
• ext4: correct inline offset when handling xattrs in inode body (bsc#1214950).
• ext4: fix wrong unit use in…

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

The following security bugs were fixed:

• CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup table. A user located in the local network or with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up to 95% (bsc#1212703).
• CVE-2023-42753: Fixed an array indexing vulnerability in the netfilter subsystem. This issue may have allowed a local user to crash the system or potentially escalate their privileges on the system. (bsc#1215150)
• CVE-2023-4389: Fixed a a double decrement of the reference count flaw in the btrfs filesystem a double decrement of the reference count, which may have allowed a local attacker with user privilege to crash the system or may lead to leaked internal kernel information. (bsc#1214351)
• CVE-2023-4921: Fixed a use-after-free vulnerability in the sch_qfq component which could be exploited to achieve local privilege escalation. (bsc#1215275)
• CVE-2023-23454: Fixed a type-confusion in the CBQ network scheduler (bsc#1207036).
• CVE-2023-4004: Fixed improper element removal netfilter nft_set_pipapo (bsc#1213812).
• CVE-2023-4622: Fixed a use-after-free vulnerability in the af_unix component which could be exploited to achieve local privilege escalation. (bsc#1215117)
• CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215115).
• CVE-2020-36766: Fixed an issue in drivers/media/cec/core/cec-api.c which could leaks one byte of kernel memory on specific hardware to unprivileged users. (bsc#1215299)
• CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs. This flaw could allow a local attacker to crash the system due to a race problem, possibly leading to a kernel information leak. (bsc#1210169)
• CVE-2023-2177: Fixed a null pointer dereference issue in the sctp network protocol which could allow a user to crash the system or potentially cause a denial of service. (bsc#1210643)
• CVE-2023-4881: Fixed a out-of-bounds write flaw in the netfilter subsystem that could lead to potential information disclosure or a denial of service (bsc#1215221).
• CVE-2023-40283: Fixed use-after-free in l2cap_sock_ready_cb (bsc#1214233).
• CVE-2023-1192: Fixed use-after-free in cifs_demultiplex_thread() (bsc#1208995).

The following non-security bugs were fixed:

• bnx2x: new flag for track HW resource allocation (bsc#1202845 bsc#1215322).
• locking/rwsem: Disable reader optimistic spinning (bnc#1176588).
• mkspec: Allow unsupported KMPs (bsc#1214386)
• scsi: qedf: Add synchronization between I/O completions and abort (bsc#1210658).
• x86/pkeys: Revert a5eff7259790 ('x86/pkeys: Add PKRU value to init_fpstate') (bsc#1215356).
• x86/srso: Do not probe microcode in a guest (git-fixes).
• x86/srso: Fix SBPB enablement for spec_rstack_overflow=off (git-fixes).
• x86/srso: Fix srso_show_state() side effect (git-fixes).
• x86/srso: Set CPUID feature bits independently of bug or mitigation status (git-fixes).

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

The following security bugs were fixed:

• CVE-2023-4389: Fixed a reference counting issue in the Btrfs filesystem that could be exploited in order to leak internal kernel information or crash the system (bsc#1214351).
• CVE-2023-42753: Fixed an array indexing vulnerability in the netfilter subsystem. This issue may have allowed a local user to crash the system or potentially escalate their privileges (bsc#1215150).
• CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup table. A user located in the local network or with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up to 95% (bsc#1212703).
• CVE-2023-4921: Fixed a use-after-free vulnerability in the QFQ network scheduler which could be exploited to achieve local privilege escalatio (bsc#1215275).
• CVE-2023-4004: Fixed improper element removal netfilter nft_set_pipapo (bsc#1213812).
• CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain sockets component which could be exploited to achieve local privilege escalation (bsc#1215117).
• CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215115).
• CVE-2020-36766: Fixed a potential information leak in in the CEC driver (bsc#1215299).
• CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs which could be exploited to crash the system (bsc#1210169).
• CVE-2023-2177: Fixed a null pointer dereference issue in the sctp network protocol which could allow a user to crash the system (bsc#1210643).
• CVE-2023-4881: Fixed a out-of-bounds write flaw in the netfilter subsystem that could lead to potential information disclosure or a denial of service (bsc#1215221).
• CVE-2023-40283: Fixed use-after-free in l2cap_sock_ready_cb (bsc#1214233).
• CVE-2023-1192: Fixed use-after-free in cifs_demultiplex_thread() (bsc#1208995).

The following non-security bugs were fixed:

• bnx2x: new flag for track HW resource allocation (bsc#1202845 bsc#1215322).
• check-for-config-changes: ignore BUILTIN_RETURN_ADDRESS_STRIPS_PAC (bsc#1214380). gcc7 on SLE 15 does not support this while later gcc does.
• locking/rwsem: Disable reader optimistic spinning (bnc#1176588).
• mkspec: Allow unsupported KMPs (bsc#1214386)
• scsi: qedf: Add synchronization between I/O completions and abort (bsc#1210658).
• x86/pkeys: Revert a5eff7259790 ('x86/pkeys: Add PKRU value to init_fpstate') (bsc#1215356).
• x86/srso: Do not probe microcode in a guest (git-fixes).
• x86/srso: Fix SBPB enablement for spec_rstack_overflow=off (git-fixes).
• x86/srso: Fix srso_show_state() side effect (git-fixes).
• x86/srso: Set CPUID feature bits independently of bug or mitigation status (git-fixes).

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

The following security bugs were fixed:

• CVE-2023-31085: Fixed a divide-by-zero error in do_div(sz,mtd->erasesize) that could cause a local DoS. (bsc#1210778)
• CVE-2023-45862: Fixed an issue in the ENE UB6250 reader driver whwere an object could potentially extend beyond the end of an allocation causing. (bsc#1216051)
• CVE-2023-34324: Fixed a possible deadlock in Linux kernel event handling. (bsc#1215745).
• CVE-2023-39189: Fixed a flaw in the Netfilter subsystem that could allow a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure. (bsc#1216046)
• CVE-2023-39194: Fixed an out of bounds read in the XFRM subsystem (bsc#1215861).
• CVE-2023-39193: Fixed an out of bounds read in the xtables subsystem (bsc#1215860).
• CVE-2023-39192: Fixed an out of bounds read in the netfilter (bsc#1215858).
• CVE-2023-42754: Fixed a NULL pointer dereference in the IPv4 stack that could lead to denial of service (bsc#1215467).
• CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup table which could be exploited by network adjacent attackers, increasing CPU usage by 95% (bsc#1212703).
• CVE-2023-4921: Fixed a use-after-free vulnerability in the QFQ network scheduler which could be exploited to achieve local privilege escalation (bsc#1215275).
• CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain sockets component which could be exploited to achieve local privilege escalation (bsc#1215117).
• CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215115).
• CVE-2020-36766: Fixed a potential information leak in in the CEC driver (bsc#1215299).
• CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs which could be exploited to crash the system (bsc#1210169).
• CVE-2023-4881: Fixed a out-of-bounds write flaw in the netfilter subsystem that could lead to potential information disclosure or a denial of service (bsc#1215221).
• CVE-2023-40283: Fixed use-after-free in l2cap_sock_ready_cb (bsc#1214233).
• CVE-2023-1192: Fixed use-after-free in cifs_demultiplex_thread() (bsc#1208995).

The following non-security bugs were fixed:

• check-for-config-changes: ignore BUILTIN_RETURN_ADDRESS_STRIPS_PAC (bsc#1214380). gcc7 on SLE 15 does not support this while later gcc does.
• mkspec: Allow unsupported KMPs (bsc#1214386)
• old-flavors: Drop 2.6 kernels. 2.6 based kernels are EOL, upgrading from them is no longer suported.