Incorrect calculation in Linux kernel - CVE-2026-31416
Published: April 14, 2026
Vulnerability identifier: #VU125865
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31416
CWE-ID: CWE-682
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 improper calculation of netlink header size in nfnetlink_log when processing netlink messages. A local user can send a specially crafted netlink message to cause a denial of service.
The issue results in a kernel warning and the affected netlink message being dropped, with no other explicitly stated effects.
How to mitigate CVE-2026-31416
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/607245c4dbb86d9a10dd8388da0fb82170a99b61
- https://git.kernel.org/stable/c/6b419700e459fbf707ca1543b7c1b57a60fedb73
- https://git.kernel.org/stable/c/6d52a4a0520a6696bdde51caa11f2d6821cd0c01
- https://git.kernel.org/stable/c/761b45c661af48da6a065868d59ab1e1f64fd9b6
- https://git.kernel.org/stable/c/88a8f56e6276f616baad4274c6b8e4683e26e520
- https://git.kernel.org/stable/c/f08ffa3e1c8e36b6131f69c5eb23700c28cbd262