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VulnerabilityPublished Updated

CVE-2026-31654: Linux kernel · mm/vma: fix memory leak in __mmap_region()

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 12 Nov 2026, 03:19 UTC

Severity
Low

Rated Low by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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.

References

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