EUVD-2026-38978

In the Linux kernel, the following vulnerability has been resolved: s390/bpf: Zero-extend bpf prog return values and kfunc arguments s390x ABI requires callers to zero-extend unsigned arguments and sign-extend signed arguments, and callees to zero-extend unsigned return values and sign-extend...

EUVD-2026-38949

In the Linux kernel, the following vulnerability has been resolved: bpf: Enforce regsafe base id consistency for BPFADDCONST scalars When regsafe compares two scalar registers that both carry BPFADDCONST, checkscalarids maps their full compound id aka base | BPFADDCONST flag as one idmap entry...

EUVD-2026-38946

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix same-register dst/src OOB read and pointer leak in sockops When a BPF sockops program accesses ctx fields with dstreg == srcreg, the SOCKOPSGETSK and SOCKOPSGETFIELD macros fail to zero the destination register in the...

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...

EUVD-2026-38901

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Take state lock for afunix iter When a BPF iterator program updates a sockmap, there is a race condition in unixstreambpfupdateproto where the peer pointer can become stale1 during a state transition TCPESTABLISHED ...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: In the bpf and arm64 architectures, there is a vulnerability where forcing an 8-byte alignment for the JIT buffer can prevent atomic tearing. The struct bpfplt structure contains a u64 target field. Currently, the BPF JIT allocat...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: bpf: prevented decltag from being referenced in funcproto Syzkaller was able to exploit the following issue: ------------ cut here --- WARNING: CPU: 0 PID: 3609 at kernel/bpf/btf.c:1946 btftypeidsize+0x2d5/0x9d0...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix for checking attempts to corrupt spilled pointers When a register is spilled onto a stack as a 1/2/4-byte register, we set slottypeBPFREGSIZE - 1 plus possibly a few more bytes depending on the actual spill size...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: bpf: Check skb-transportheader is set in bpfskbcheckmtu. The bpfskbcheckmtu helper needs to use skb-transportheader when the BPFMTUCHKSEGS flag is used: bpfskbcheckmtuskb, ifindex, &mtulen, 0, BPFMTUCHKSEGS. The transportheader i...

Astra Linux – Vulnerability found in Linux 5.15, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: bpf: Prevent “decltag” from being referenced in “funcproto” arguments. Syzkaller managed to encounter another issue with “decltag”: btffuncprotocheck kernel/bpf/btf.c:4506 inline btfcheckalltypes kernel/bpf/btf.c:4734 inline...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: bpf: Fixed the memory leak in bpfskselectreuseport As pointed out in the original comment, a lookup in sockmap can return a TCP ESTABLISHED socket. Such a TCP socket may have had SOATTACHREUSEPORTEBPF set before it became...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Rejects redirects of skmsg messages to non-TCP sockets With a SOCKMAP/SOCKHASH map and a skmsg program, users can direct messages sent from one TCP socket s1 to actually exiting from another TCP socket s2...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Fixed the jump offset calculation in tailcall. The additional call to bpfintjitcompile skips the JIT context initialization. This effectively skips the offset calculation, resulting in outoffset = -1. Therefore, t...

Astra Linux – Vulnerabilities in Linux-6.1, Linux-5.15, Linux-5.10

In the Linux kernel, the following vulnerability has been resolved: arm64: bpf: Mitigation is only applied to cBPF programs loaded by unprivileged users. Support for eBPF programs loaded by unprivileged users is typically disabled. This means that only cBPF programs need to be mitigated for BHB...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: bpf: Do not report a verification bug for missing bpfsccvisit calls on speculative execution paths. Syzbot generated a program that triggers a verifierbug call in maybeexitscc. maybeexitscc assumes that, when called for a state...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: bpf: Fixed incorrect reg type conversion in releasereference Some helper functions will allocate memory. To avoid memory leaks, the verifier requires the eBPF program to release this memory by calling the corresponding helper...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: bpf: Fixed the metadatadst leak in bpfredirectneigh for arguments bpfredirectneighv4,6 Cilium includes a BPF egress gateway feature that forces outgoing Kubernetes Pods’ traffic to pass through dedicated egress gateways. This...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: bpf: Fixed out-of-bounds access in cgroup local storage Lonial reported that an out-of-bounds access in cgroup local storage can occur through tail calls. This occurs when two programs each utilize a cgroup local storage with a...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: media: rc: The bpf attach/detach operation requires write permission. source-iocs-preserved const=CAPNETADMIN...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: BPF: Use VMMAP instead of VMALLOC for the ringbuf area. After the commit 2fd3fb0be1d1 “KASAN, vmalloc: Unpoison VMALLOC pages after mapping”, non-VMALLOC mappings will be marked as accessible in getvmareanode when KASAN is enable...