CVE-2026-64519: Linux kernel · NFSD: Fix infinite loop in layout state revocation
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 7.0.0-1014.14~24.04.1 : update Linux kernel when convenient.
Data as of 9 Nov 2026, 15:33 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- Patch
- Available – fixed in 7.0.0-1014.14~24.04.1, 7.0.0-1013.13~24.04.1, 7.0.0-1011.11~24.04.1 +12
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Jul 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 9 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Patches and advisories
- ubuntu.com/security/notices/USN-8618-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8663-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8664-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-3 (opens in a new tab)
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and has been applied in Linux kernel versions 7.0.0-28.28~24.04.1 and later. Users should update to these fixed versions to remediate the issue. No additional mitigation actions are required beyond applying the official fix.
Description
A vulnerability in the Linux kernel's NFSD subsystem caused an infinite loop during layout state revocation. The issue arises because the revocation function does not properly set a status flag before calling a close operation, causing a retry loop to repeatedly find the same layout state and hang indefinitely. This flaw has been fixed in Linux kernel versions 7.0.0 and later.
References
- ubuntu.com/security/CVE-2026-64519 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-64519 (opens in a new tab)
- git.kernel.org/linus/4f8ef58c10bfe5f86a643c7c8331b37e69e3dae1 (opens in a new tab)
- git.kernel.org/stable/c/44e5e4eb3a07bf3e1d931dd9f96f3edcfa376605 (opens in a new tab)
- git.kernel.org/stable/c/4f8ef58c10bfe5f86a643c7c8331b37e69e3dae1 (opens in a new tab)
- git.kernel.org/stable/c/d1fc00ec02e9deb3f8d2bd59caf938c554fbc576 (opens in a new tab)
- git.kernel.org/stable/c/fe59ae27d7346245f5d8d97220f374e63efd28b5 (opens in a new tab)
- ubuntu.com/security/notices/USN-8618-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8663-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8664-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-3 (opens in a new tab)