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VulnerabilityPublished

CVE-2026-64519: Linux kernel · NFSD: Fix infinite loop in layout state revocation

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 3 Nov 2026, 18:43 UTC

Severity
Medium

Rated Medium 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 25 Jul 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 3 Nov 2026.

What to do

AI-suggested

A fix for this issue has been implemented in the Linux kernel. Users should apply the official kernel updates containing this fix once available.

Description

A vulnerability in the Linux kernel's NFSD component caused an infinite loop during layout state revocation. The issue arises because the function nfsd4_revoke_states() does not set a status flag before calling nfsd4_close_layout(), causing the revocation retry loop to repeatedly process the same layout state identifier without progress, leading to a hang.

References

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