arm64: bpf: Add BHB mitigation to the epilogue for cBPF programs
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
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 · LinuxReferences
https://git.kernel.org/stable/c/0dfefc2ea2f29ced2416017d7e5b1253a54c2735https://git.kernel.org/stable/c/38c345fd54afd9d6ed8d3fcddf3f6ea23887bf78https://git.kernel.org/stable/c/42a20cf51011788f04cf2adbcd7681f02bdb6c27https://git.kernel.org/stable/c/852b8ae934b5cbdc62496fa56ce9969aa2edda7fhttps://git.kernel.org/stable/c/8fe5c37b0e08a97cf0210bb75970e945aaaeebabhttps://git.kernel.org/stable/c/993f63239c219696aef8887a4e7d3a16bf5a8ecehttps://git.kernel.org/stable/c/c6a8735d841bcb7649734bb3a787bb174c67c0d8https://lists.debian.org/debian-lts-announce/2025/08/msg00010.htmlhttps://lists.debian.org/debian-lts-announce/2025/10/msg00007.html