CVE-2026-31654: Linux kernel · mm/vma: fix memory leak in __mmap_region()
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 12 Nov 2026, 03:19 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 24 Apr 2026
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 11 Nov 2026.
What to do
AI-suggested
A fix for this memory leak has been implemented in the Linux kernel. Users should update to the fixed kernel version once available. Since this is a kernel memory management bug, applying the official patch or upgrading the kernel is the recommended mitigation.
Description
A memory leak vulnerability in the Linux kernel's __mmap_region() function was fixed. The flaw occurs when mmap'ing /dev/zero with MAP_SHARED, where a replacement file allocated for the mapping is not properly released on error paths, leading to a memory leak. This issue was identified and corrected by adding a missing fput() call to release the swapped file in error scenarios.