CVE-2026-64473: Linux kernel · vfio: Remove device debugfs before releasing devres
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 3 Nov 2026, 19:29 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 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 3 Nov 2026.
What to do
AI-suggested
A fix has been implemented in the Linux kernel to remove the per-device debugfs tree before releasing device resources and to clear the debugfs root after removal. Users should update to the fixed kernel version once available. No additional mitigation is required as the debugfs view is diagnostic only and the issue does not pose a direct security risk.
Description
A vulnerability in the Linux kernel's VFIO subsystem involves improper removal of device debugfs entries during device unregistration. Debugfs entries created for VFIO devices may remain visible with stale inode private data after device resources are released, potentially causing confusion or diagnostic inaccuracies. The fix involves removing the per-device debugfs tree before releasing device resources and clearing the debugfs root to prevent stale entries.
References
- git.kernel.org/stable/c/6cc60b41d61657dc469893d14e8e55d160056ff1 (opens in a new tab)
- git.kernel.org/stable/c/a53109ffb6b5148e11a27fb7670355b92db12dd3 (opens in a new tab)
- git.kernel.org/stable/c/a5df401dc84f091e20b045560569f0736758fea7 (opens in a new tab)
- git.kernel.org/stable/c/dc7fe87de492ea7f33a72b78d26650b75bf37f4f (opens in a new tab)