Race condition in Linux kernel - CVE-2026-64472
Published: July 27, 2026
Vulnerability identifier: #VU139468
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64472
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in vfio/mlx5 page tracker and device state flag handling when concurrently updating runtime bitfields. A local user can trigger concurrent device operations to cause a denial of service.
The issue affects flags that can be updated during runtime, including dirty tracking, reset handling, tracker error handling, and VF attach or detach event processing.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-64472
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.100-1
linux (Debian package) - update to 6.12.100-1
External References
- https://git.kernel.org/stable/c/1dd99b8f4e143592e12e5a77e7b538bc698116cb
- https://git.kernel.org/stable/c/399d806f998f7a25405fc1b97227e579aead24af
- https://git.kernel.org/stable/c/39d163627b51886492bf31f66cb02c94613d2287
- https://git.kernel.org/stable/c/7ed120b1a007bace57c461805519d70e1af44e59
- https://git.kernel.org/stable/c/f1db80a67da928a92ba460ede1be52d8941f46be
- https://git.kernel.org/stable/c/f2365a63b02ddea32e7db78b742c2503ec7b81f1