CVE-2025-37948: Linux kernel · arm64: bpf: Add BHB mitigation to the epilogue for cBPF programs
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 5 Nov 2026, 22:02 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 20 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
AI-suggested
A fix has been implemented in the Linux kernel to emit a BHB mitigation sequence at the epilogue of classic cBPF programs loaded by seccomp. Users should update to the Linux kernel version that includes this fix once it is released. No additional mitigation steps are indicated in the provided data.
Description
A vulnerability in the Linux kernel's arm64 BPF implementation related to classic BPF (cBPF) programs loaded by seccomp has been addressed by adding a Branch History Buffer (BHB) mitigation sequence at the program epilogue. This prevents malicious BPF programs from manipulating branch history to influence hardware speculation.
References
- git.kernel.org/stable/c/c6a8735d841bcb7649734bb3a787bb174c67c0d8 (opens in a new tab)
- git.kernel.org/stable/c/993f63239c219696aef8887a4e7d3a16bf5a8ece (opens in a new tab)
- git.kernel.org/stable/c/8fe5c37b0e08a97cf0210bb75970e945aaaeebab (opens in a new tab)
- git.kernel.org/stable/c/42a20cf51011788f04cf2adbcd7681f02bdb6c27 (opens in a new tab)
- git.kernel.org/stable/c/38c345fd54afd9d6ed8d3fcddf3f6ea23887bf78 (opens in a new tab)
- git.kernel.org/stable/c/852b8ae934b5cbdc62496fa56ce9969aa2edda7f (opens in a new tab)
- git.kernel.org/stable/c/0dfefc2ea2f29ced2416017d7e5b1253a54c2735 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/08/msg00010.html (opens in a new tab)