Race condition in Linux kernel - CVE-2026-64095
Published: July 20, 2026
Vulnerability identifier: #VU138542
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-64095
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in the batman-adv bridge loop avoidance subsystem when handling concurrent backbone gateway state changes and request tracking. A local user can trigger concurrent operations to cause a denial of service.
The issue stems from non-atomic updates to request state and the bla.num_requests counter across multiple concurrent code paths.
How to mitigate CVE-2026-64095
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1f013bc94154f2e78e97d0296175664224c796e0
- https://git.kernel.org/stable/c/45384612f29692fbf0c770200361a7acff90125c
- https://git.kernel.org/stable/c/461f1e3dfb888701895b766446c55db2b10db705
- https://git.kernel.org/stable/c/5328b95960774f2e189f22485616bc7b8eb2f7e3
- https://git.kernel.org/stable/c/65497ad155a3246df177b5ef662cd6e5a32cb470
- https://git.kernel.org/stable/c/83ab69bd12b80f6ea169c8bea6977701b53a043d
- https://git.kernel.org/stable/c/8ff9c59d1b7b48c2596878341a5310f32895d52b
- https://git.kernel.org/stable/c/a9393751ecf7e9096f93cb6eed02db4f79125765