SB20260425190 - Improper input validation in Linux kernel openvswitch
Published: April 25, 2026
Security Bulletin ID
SB20260425190
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper input validation (CVE-ID: CVE-2026-31679)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 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
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper input validation in openvswitch SET/SET_MASKED action handling for OVS_KEY_ATTR_MPLS when processing crafted MPLS action payload lengths. A local user can send a specially crafted request to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2ca33b88a79ca42f017ae0f7011280325655438e
- https://git.kernel.org/stable/c/4cae986225f8b8679ad86b924918e7d75a96aa61
- https://git.kernel.org/stable/c/546b68ac893595877ffbd7751e5c55fd1c43ede6
- https://git.kernel.org/stable/c/68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f
- https://git.kernel.org/stable/c/8ed7b9930cbc3bc71f868fa79a68700ac88d586a
- https://git.kernel.org/stable/c/98de18d327ef8cbbb704980e359e4872d8c28997
- https://git.kernel.org/stable/c/bd50c7484c3bb34097571c1334174fb8b7408036
- https://git.kernel.org/stable/c/c1f97152df8dfb17e855ddf0fc409b7bd13e9700