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VulnerabilityPublished

CVE-2026-98920: Linux kernel · netfs: Fix missing alloc tagging of direct mempool allocations

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited · fixed in b78b728e21c32ec4c330b299f657fb1eb02dffc2 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 15:33 UTC

Severity
Low

Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS
0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in b78b728e21c32ec4c330b299f657fb1eb02dffc2, 37a2042748bc880df03ff8315db86ed82991fbb8, 7.2 +2

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=6.12.114 <6.13
  • >=7.1.8 <7.2
Fixed in
  • b78b728e21c32ec4c330b299f657fb1eb02dffc2
  • 37a2042748bc880df03ff8315db86ed82991fbb8
  • 7.2
  • 6.13
  • 5c03da745171485fd181f17b69213464f6d05f3d
LinuxLinuxAffected
  • =7.2
Fixed in–

AI-suggested

A fix is available and has been applied in Linux kernel versions 6.13, 7.2, and corresponding commits. Users should update to these fixed versions to resolve the missing allocation tagging issue. No additional mitigation is required beyond applying the official patch.

Description

A vulnerability in the Linux kernel's netfs subsystem involved missing allocation tagging for direct mempool allocations. This caused warnings and missing allocation records when CONFIG_MEM_ALLOC_PROFILING_DEBUG was enabled, impacting memory allocation tracking during writeback operations on CIFS mounts. The issue was fixed by wrapping direct allocation calls with proper tagging hooks to ensure correct allocation profiling.

References

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