Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: bpf: Fixed the stackmap overflow check in bpfgetstackid Syzkaller reported a KASAN vulnerability related to out-of-bounds write operations in bpfgetstackid, when copying stack trace data. This issue occurs when the perf trace...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: BPF: crypto: Use the correct destructor kfunc type With CONFIGCFI enabled, the kernel strictly ensures that indirect function calls use a function pointer type that matches the target function. I encountered the following type...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: bpf: Fixed a reference count leak in bpfprogtestrunxdp syzbot reports: unregisternetdevice: Waiting for sit0 to become available. Usage count = 2. A debug printk patch revealed that a reference count is obtained at...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: bpf: Fixed an invalid prog-stats access when updateeffectiveprogs fails. The issue occurs due to a fault-injected code sequence in updateeffectiveprogs. The problem can be described as follows: c cgroupbpfdetach...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Sign extension of kfunc call arguments kfunc calls are native calls, so they should follow LoongArch calling conventions. Sign extension of arguments should be performed properly to avoid kernel panic. This is...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: veth: The XDP function has been modified to reduce the time spent on the nodirect return section, thereby fixing a race condition. As explained in the commit fa349e396e48 “veth: Fixed a race condition involving AFXDP, which expos...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: BPF: Do not allow BPF test infra to emit invalid GSO types to the stack. Yinhao et al. reported that their fuzzer tool was able to trigger the skbwarnbadoffload function from netifskbfeatures - gsofeaturescheck. When a BPF progra...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: bpf: Added bpfprogrundatapointers syzbot found that clsbpfclassify can change tcskbcbskb-dropreason, triggering a warning in skskbreasonDrop. WARNING: CPU: 0, PID: 5965, at net/core/skbuff.c:1192 skskbreasonDrop,...

UBUNTU-CVE-2026-52938

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix NULL pointer dereference in bpfskstorageclone and diag paths bpfselemunlinknofail sets SDATAselem-smap to NULL before removing the selem from the storage hlist. A concurrent RCU reader in bpfskstorageclone can observe th...

CVE-2026-52938

CVE-2026-52938 concerns a race in Linux kernel BPF storage: bpf_selem_unlink_nofail() clears smap before removal, allowing a concurrent reader in bpf_sk_storage_clone() to observe a NULL smap and dereference a NULL pointer, potentially crashing the kernel (DoS). Reports describe a null-ptr-deref ...

CVE-2026-52938

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix NULL pointer dereference in bpfskstorageclone and diag paths bpfselemunlinknofail sets SDATAselem-smap to NULL before removing the selem from the storage hlist. A concurrent RCU reader in bpfskstorageclone can observe th...

CVE-2026-52938 bpf: Fix NULL pointer dereference in bpf_sk_storage_clone and diag paths

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix NULL pointer dereference in bpfskstorageclone and diag paths bpfselemunlinknofail sets SDATAselem-smap to NULL before removing the selem from the storage hlist. A concurrent RCU reader in bpfskstorageclone can observe th...

EUVD-2026-38708

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix NULL pointer dereference in bpfskstorageclone and diag paths bpfselemunlinknofail sets SDATAselem-smap to NULL before removing the selem from the storage hlist. A concurrent RCU reader in bpfskstorageclone can observe th...

CVE-2026-52938 bpf: Fix NULL pointer dereference in bpf_sk_storage_clone and diag paths

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix NULL pointer dereference in bpfskstorageclone and diag paths bpfselemunlinknofail sets SDATAselem-smap to NULL before removing the selem from the storage hlist. A concurrent RCU reader in bpfskstorageclone can observe th...

PT-2026-52005

Name of the Vulnerable Software and Affected Versions Linux kernel version 6.19.0-rc5 Description A null pointer dereference issue exists in the bpf lwt xmit push encap helper. The issue occurs because the skb- skb refdst variable may not be initialized when the socket buffer skb is set up by the...

PT-2026-52000

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A deadlock can occur in the Linux kernel when deleting local storage within a Non-Maskable Interrupt NMI or reentrant context. This happens when freeing storage elements through kfree rc...

PT-2026-51731

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A NULL pointer dereference exists in the BPF Berkeley Packet Filter subsystem. The function bpf selem unlink nofail sets the smap variable to NULL before removing the element from the...

PT-2026-51986

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the BPF Berkeley Packet Filter verifier regarding linked register delta tracking. When the source register src reg and destination register dst reg are pointers to the...

PT-2026-51983

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists when querying information for an offloaded BPF map or program. The functions bpf map offload info fill ns and bpf prog offload info fill ns use get netdev...

PT-2026-51977

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.14.0-13195-g967e8def1100 Description An issue exists in the Linux kernel where the bpf fd array map clear function fails to yield the processor during its execution loop. For PROG ARRAY maps containing a large...