EUVD-2026-86691

In the Linux kernel, the following vulnerability has been resolved: bpf: Keep refcountacquire nullable for borrowed RCU kptrs bpfrefcountacquire is fallible for a borrowed reference because the object may have reached a zero refcount. The verifier therefore keeps KFRETNULL on the return value...

EUVD-2026-86690

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject untrusted allocated-object pointers When the final RCU read-side critical section ends, a local kptr is demoted to PTRUNTRUSTED but retains MEMALLOC. The pointer may be NULL or may refer to an object whose lifetime is...

EUVD-2026-86688

In the Linux kernel, the following vulnerability has been resolved: bpf: Cancel special fields when recycling rhtab elements rhtabmapupdateexisting and rhtabdeleteelem call bpfobjfreefields when replacing or deleting a value. These map operations can run from BPF programs in NMI context, where...

CVE-2026-98034

The Linux kernel contains a vulnerability where the BPF verifier fails to mark a register as precise when it is known to contain zero during a scalar store into an untrusted kptr field. Because check_map_kptr_access() does not mark the register as precise, a state checkpoint with an imprecise zer...

AZL-102240 CVE-2026-90317 affecting package kernel 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: bpf: Invalidate RCU pointers after final spin unlock In a sleepable BPF program, a spin lock can provide the only RCU protection for a kptr. The final bpfspinunlock ends that protection, but the verifier leaves the pointer valid...

CVE-2026-93148: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject MEMALLOC BTF accesses past object bounds BTF struct walks relax the struct-size check for accesses through a trailing flexible array. That is valid for ordinary BTF type walking, but PTRTOBTFID | MEMALLOC values point...

PT-2026-89875

NetBSD contains an information disclosure vulnerability in mm open within sys/dev/mm.c that allows unprivileged local users to obtain real kernel virtual addresses by opening world-accessible devices such as /dev/null or /dev/zero, which incorrectly receive the PK KMEM process flag. Attackers can...

SUSE CVE-2026-74314

In the Linux kernel, the following vulnerability has been resolved: bpf: Cancel special fields on map value recycle Map update and delete paths currently call bpfobjfreefields when a value is being replaced or recycled. That makes field destruction depend on the context of the update/delete...

AZL-96441 CVE-2026-74314 affecting package kernel 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: bpf: Cancel special fields on map value recycle Map update and delete paths currently call bpfobjfreefields when a value is being replaced or recycled. That makes field destruction depend on the context of the update/delete...

CVE-2026-74314

CVE-2026-74314 relates to the Linux kernel BPF map value handling. The description shows a fix for canceling field cleanup on map value recycle: during updates/deletes, fields no longer are eagerly freed via bpf_obj_free_fields(); instead, bpf_obj_cancel_fields() performs only NMI-safe cleanup fo...

bpf: Fix NULL deref in map_kptr_match_type for scalar regs

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CVE-2026-53032

A flaw was found in the Linux kernel's Berkeley Packet Filter BPF subsystem. This vulnerability occurs in the mapkptrmatchtype function when a scalar register is stored into a kernel pointer kptr slot. Due to an incorrect order of checks, the system attempts to access a null pointer, specifically...

EUVD-2026-38900

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix NULL deref in mapkptrmatchtype for scalar regs Commit ab6c637ad027 "bpf: Fix a bpfkptrxchg issue with local kptr" refactored mapkptrmatchtype to branch on btfiskernel before checking basetype. A scalar register stored in...

CVE-2026-53032 bpf: Fix NULL deref in map_kptr_match_type for scalar regs

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix NULL deref in mapkptrmatchtype for scalar regs Commit ab6c637ad027 "bpf: Fix a bpfkptrxchg issue with local kptr" refactored mapkptrmatchtype to branch on btfiskernel before checking basetype. A scalar register stored in...

CVE-2026-53032 bpf: Fix NULL deref in map_kptr_match_type for scalar regs

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix NULL deref in mapkptrmatchtype for scalar regs Commit ab6c637ad027 "bpf: Fix a bpfkptrxchg issue with local kptr" refactored mapkptrmatchtype to branch on btfiskernel before checking basetype. A scalar register stored in...

CVE-2026-53032

The CVE-2026-53032 issue affects the Linux kernel's BPF subsystem, specifically the map_kptr_match_type function. A scalar register stored into a kptr can trigger a NULL dereference when the code branches on btf_is_kernel(reg->btf) before verifying base_type(), since such registers have no BTF...

kernel: mm/kmemleak: fix sleeping function called from invalid context at print message

In the Linux kernel, the following vulnerability has been resolved: mm/kmemleak: fix sleeping function called from invalid context at print message Address a bug in the kernel that triggers a "sleeping function called from invalid context" warning when /sys/kernel/debug/kmemleak is printed under...

SUSE CVE-2024-57885

In the Linux kernel, the following vulnerability has been resolved: mm/kmemleak: fix sleeping function called from invalid context at print message Address a bug in the kernel that triggers a "sleeping function called from invalid context" warning when /sys/kernel/debug/kmemleak is printed under...

DEBIAN-CVE-2024-57885

In the Linux kernel, the following vulnerability has been resolved: mm/kmemleak: fix sleeping function called from invalid context at print message Address a bug in the kernel that triggers a "sleeping function called from invalid context" warning when /sys/kernel/debug/kmemleak is printed under...

Linux Kernel 4.13 - 'compat_get_timex()' Leak Kernel Pointer

define GNUSOURCE define BSDSOURCE include include include include include include include include include include include include include include include include include include // Ubuntu 4.13.0-16-generic // gcc -o poc poc.c -m32 struct timex time; int mainint argc, char argv int r; unsigned lon...