CVE-2026-23443

CVE-2026-23443 refers to a Linux kernel ACPI processor errata handling flaw (piix4). A use-after-free could occur from dereferencing device pointers after their objects were freed, stemming from a NULL-pointer dereference in acpi_processor_errata_piix4(). The fix moves diagnostic message printing...

CVE-2026-23443 ACPI: processor: Fix previous acpi_processor_errata_piix4() fix

In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: Fix previous acpiprocessorerratapiix4 fix After commi f132e089fe89 "ACPI: processor: Fix NULL-pointer dereference in acpiprocessorerratapiix4", device pointers may be dereferenced after dropping references to the...

CVE-2026-23443 ACPI: processor: Fix previous acpi_processor_errata_piix4() fix

In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: Fix previous acpiprocessorerratapiix4 fix After commi f132e089fe89 "ACPI: processor: Fix NULL-pointer dereference in acpiprocessorerratapiix4", device pointers may be dereferenced after dropping references to the...

CVE-2026-23442

In the Linux kernel, the following vulnerability has been resolved: ipv6: add NULL checks for idev in SRv6 paths in6devget can return NULL when the device has no IPv6 configuration e.g. MTU IPV6MINMTU or after NETDEVUNREGISTER. Add NULL checks for idev returned by in6devget in both...

CVE-2026-23442 ipv6: add NULL checks for idev in SRv6 paths

In the Linux kernel, the following vulnerability has been resolved: ipv6: add NULL checks for idev in SRv6 paths in6devget can return NULL when the device has no IPv6 configuration e.g. MTU IPV6MINMTU or after NETDEVUNREGISTER. Add NULL checks for idev returned by in6devget in both...

CVE-2026-23439 udp_tunnel: fix NULL deref caused by udp_sock_create6 when CONFIG_IPV6=n

In the Linux kernel, the following vulnerability has been resolved: udptunnel: fix NULL deref caused by udpsockcreate6 when CONFIGIPV6=n When CONFIGIPV6 is disabled, the udpsockcreate6 function returns 0 success without actually creating a socket. Callers such as foucreate then proceed to...

CVE-2026-23438

In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: guard flow control update with globaltxfc in buffer switching mvpp2bmswitchbuffers unconditionally calls mvpp2bmpoolupdateprivfc when switching between per-cpu and shared buffer pool modes. This function programs CM3...

CVE-2026-23438

In the Linux kernel mvpp2 driver, CVE-2026-23438 arises from an unconditional access to CM3 flow control via mvpp2_cm3_read()/mvpp2_cm3_write() in mvpp2_bm_switch_buffers(), when priv->cm3_base is NULL (e.g., CM3 SRAM not present in device tree). This can crash the kernel on MTU changes that c...

CVE-2026-23438 net: mvpp2: guard flow control update with global_tx_fc in buffer switching

In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: guard flow control update with globaltxfc in buffer switching mvpp2bmswitchbuffers unconditionally calls mvpp2bmpoolupdateprivfc when switching between per-cpu and shared buffer pool modes. This function programs CM3...

CVE-2026-23435

In the Linux kernel, the following vulnerability has been resolved: perf/x86: Move event pointer setup earlier in x86pmuenable A production AMD EPYC system crashed with a NULL pointer dereference in the PMU NMI handler: BUG: kernel NULL pointer dereference, address: 0000000000000198 RIP:...

CVE-2026-23435

The CVE-2026-23435 entries describe a Linux kernel PMU/X86 perf vulnerability that was resolved. The root cause was a commit that moved cpuc->events[idx] assignment out of x86_pmu_start() into step 2 of x86_pmu_enable(), after PERF_HES_ARCH checks. This could allow a path that calls pmu->st...

CVE-2026-23435 perf/x86: Move event pointer setup earlier in x86_pmu_enable()

In the Linux kernel, the following vulnerability has been resolved: perf/x86: Move event pointer setup earlier in x86pmuenable A production AMD EPYC system crashed with a NULL pointer dereference in the PMU NMI handler: BUG: kernel NULL pointer dereference, address: 0000000000000198 RIP:...

CVE-2026-23435 perf/x86: Move event pointer setup earlier in x86_pmu_enable()

In the Linux kernel, the following vulnerability has been resolved: perf/x86: Move event pointer setup earlier in x86pmuenable A production AMD EPYC system crashed with a NULL pointer dereference in the PMU NMI handler: BUG: kernel NULL pointer dereference, address: 0000000000000198 RIP:...

CVE-2026-23433

CVE-2026-23433 concerns the Linux kernel arm_mpam component and memory bandwidth monitoring. The root cause is a null pointer dereference in mpam_restore_mbwu_state: when an MSC is offline then online, __ris_msmon_read() is invoked via IPIs to restore bandwidth-counter configuration, but mbwu_arg...

CVE-2026-23433 arm_mpam: Fix null pointer dereference when restoring bandwidth counters

In the Linux kernel, the following vulnerability has been resolved: armmpam: Fix null pointer dereference when restoring bandwidth counters When an MSC supporting memory bandwidth monitoring is brought offline and then online, mpamrestorembwustate calls rismsmonread via ipi to restore the...

CVE-2026-23433

In the Linux kernel, the following vulnerability has been resolved: armmpam: Fix null pointer dereference when restoring bandwidth counters When an MSC supporting memory bandwidth monitoring is brought offline and then online, mpamrestorembwustate calls rismsmonread via ipi to restore the...

CVE-2026-23433 arm_mpam: Fix null pointer dereference when restoring bandwidth counters

In the Linux kernel, the following vulnerability has been resolved: armmpam: Fix null pointer dereference when restoring bandwidth counters When an MSC supporting memory bandwidth monitoring is brought offline and then online, mpamrestorembwustate calls rismsmonread via ipi to restore the...

K000160611: Linux kernel vulnerabilities CVE-2026-23279, CVE-2026-23281, and CVE-2026-23367

Security Advisory Description CVE-2026-23279 In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix NULL pointer dereference in meshrxcsaframe In meshrxcsaframe, elems-meshchanswparamsie is dereferenced at lines 1638 and 1642 without a prior NULL check:...

OESA-2026-1833 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: timers: Fix NULL function pointer race in timershutdownsync There is a race condition between timershutdownsync and timer expiration that can lead to hitting a...

PT-2026-30169

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contained a flaw where controller per-cpu statistics were not allocated until after the controller was registered, creating a window where accessing sysfs attributes cou...