CVE-2025-37807: Linux kernel · bpf: Fix kmemleak warning for percpu hashmap
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 14:05 UTC
Rated Low 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 8 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 30 Oct 2026.
What to do
AI-suggested
A fix has been implemented in the Linux kernel to correct the alignment of the percpu pointer in the BPF percpu hashmap, eliminating the kmemleak warning. Users should update to the fixed kernel version once available to resolve this issue.
Description
A memory leak warning issue in the Linux kernel's BPF subsystem related to percpu hashmap alignment has been fixed. The problem was caused by storing a percpu pointer without proper 8-byte alignment, leading to kmemleak falsely reporting unreferenced memory. This was addressed by ensuring the pointer is stored with 8-byte alignment, resolving the kmemleak warning.
References
- git.kernel.org/stable/c/c5f4b04e1838b9eec426d80500af49cff8631762 (opens in a new tab)
- git.kernel.org/stable/c/25014e3dfa6d2fb95c920b9e6b2f0b303baa4533 (opens in a new tab)
- git.kernel.org/stable/c/7758e308aeda1038aba1944f7302d34161b3effe (opens in a new tab)
- git.kernel.org/stable/c/1f1c29aa1934177349c17e3c32e68ec38a7a56df (opens in a new tab)
- git.kernel.org/stable/c/11ba7ce076e5903e7bdc1fd1498979c331b3c286 (opens in a new tab)