Use-after-free in Linux kernel - CVE-2026-46212
Published: May 29, 2026
Vulnerability identifier: #VU132988
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-2026-46212
CWE-ID: CWE-416
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 use-after-free in batadv_bla_del_backbone_claims() when deleting backbone claims. A local user can trigger claim deletion to cause a denial of service.
How to mitigate CVE-2026-46212
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401
- https://git.kernel.org/stable/c/0cc9847c64cb6e61118bc78c9187c8209a7197fa
- https://git.kernel.org/stable/c/368449e467d5f1e2c2e987bf2bd57000ba75e10b
- https://git.kernel.org/stable/c/4ae1709a314060a196981b344610d023ea841e57
- https://git.kernel.org/stable/c/6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472