Description
In the Linux kernel, the following vulnerability has been resolved: arm64: bpf: Add BHB mitigation to the epilogue for cBPF programs A malicious BPF program may manipulate the branch history to influence what the hardware speculates will happen next. On exit from a BPF program, emit the BHB mititgation sequence. This is only applied for 'classic' cBPF programs that are loaded by seccomp.
Affected products
linux: linux kernel; debian: debian linux
References9
- git.kernel.org/stable/c/0dfefc2ea2f29ced2416017d7e5b1253a54c2735 Patch
- git.kernel.org/stable/c/38c345fd54afd9d6ed8d3fcddf3f6ea23887bf78 Patch
- git.kernel.org/stable/c/42a20cf51011788f04cf2adbcd7681f02bdb6c27 Patch
- git.kernel.org/stable/c/852b8ae934b5cbdc62496fa56ce9969aa2edda7f Patch
- git.kernel.org/stable/c/8fe5c37b0e08a97cf0210bb75970e945aaaeebab Patch
- git.kernel.org/stable/c/993f63239c219696aef8887a4e7d3a16bf5a8ece Patch
- git.kernel.org/stable/c/c6a8735d841bcb7649734bb3a787bb174c67c0d8 Patch
- lists.debian.org/debian-lts-announce/2025/08/msg00010.html Third Party Advisory
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html Third Party Advisory
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 11 · as of 7 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.