CVE-2025-37958: Linux kernel · mm/huge_memory: fix dereferencing invalid pmd migration entry
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 for this vulnerability has been implemented upstream in the Linux kernel. Users and administrators should apply the official kernel updates that include this fix. Since this is a kernel-level issue, updating to a patched kernel version is the recommended mitigation. No additional workarounds or mitigations are described.
Description
A vulnerability in the Linux kernel's huge memory management subsystem (mm/huge_memory) involves dereferencing an invalid PMD migration entry during transparent huge page (THP) migration. This can cause invalid address access and lead to a kernel page fault. The issue arises from concurrent access to the PMD migration entry during a deferred split scan. The flaw has been fixed by adding a check on the PMD migration entry to return early and avoid invalid access.
References
- git.kernel.org/stable/c/753f142f7ff7d2223a47105b61e1efd91587d711 (opens in a new tab)
- git.kernel.org/stable/c/9468afbda3fbfcec21ac8132364dff3dab945faf (opens in a new tab)
- git.kernel.org/stable/c/ef5706bed97e240b4abf4233ceb03da7336bc775 (opens in a new tab)
- git.kernel.org/stable/c/22f6368768340260e862f35151d2e1c55cb1dc75 (opens in a new tab)
- git.kernel.org/stable/c/3977946f61cdba87b6b5aaf7d7094e96089583a5 (opens in a new tab)
- git.kernel.org/stable/c/6166c3cf405441f7147b322980144feb3cefc617 (opens in a new tab)
- git.kernel.org/stable/c/fbab262b0c8226c697af1851a424896ed47dedcc (opens in a new tab)
- git.kernel.org/stable/c/be6e843fc51a584672dfd9c4a6a24c8cb81d5fb7 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)