PT-2026-35139 · Linux · Linux

Published 2026-04-25 · Updated 2026-04-25 · CVE-2026-31679

NVD

In the Linux kernel, the following vulnerability has been resolved:

openvswitch: validate MPLS set/set masked payload length

validate set() accepted OVS KEY ATTR MPLS as variable-sized payload for SET/SET MASKED actions. In action handling, OVS expects fixed-size MPLS key data (struct ovs key mpls).

Use the already normalized key len (masked case included) and reject non-matching MPLS action key sizes.

Reject invalid MPLS action payload lengths early.

Related Identifiers

CVE-2026-31679

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-31679 · Security Note
• https://git.kernel.org/stable/c/c1f97152df8dfb17e855ddf0fc409b7bd13e9700 · Note
• https://git.kernel.org/stable/c/546b68ac893595877ffbd7751e5c55fd1c43ede6 · Note
• https://git.kernel.org/stable/c/8ed7b9930cbc3bc71f868fa79a68700ac88d586a · Note
• https://git.kernel.org/stable/c/98de18d327ef8cbbb704980e359e4872d8c28997 · Note
• https://git.kernel.org/stable/c/68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f · Note
• https://git.kernel.org/stable/c/4cae986225f8b8679ad86b924918e7d75a96aa61 · Note
• https://git.kernel.org/stable/c/2ca33b88a79ca42f017ae0f7011280325655438e · Note
• https://git.kernel.org/stable/c/bd50c7484c3bb34097571c1334174fb8b7408036 · Note