Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.5, < 5.10.253 |
References
- https://git.kernel.org/stable/c/2ca33b88a79ca42f017ae0f7011280325655438ePatch
- https://git.kernel.org/stable/c/4cae986225f8b8679ad86b924918e7d75a96aa61Patch
- https://git.kernel.org/stable/c/546b68ac893595877ffbd7751e5c55fd1c43ede6Patch
- https://git.kernel.org/stable/c/68f32ef0683c8d1c05cd2e4f16818fa63ff59c6fPatch
- https://git.kernel.org/stable/c/8ed7b9930cbc3bc71f868fa79a68700ac88d586aPatch
- https://git.kernel.org/stable/c/98de18d327ef8cbbb704980e359e4872d8c28997Patch
- https://git.kernel.org/stable/c/bd50c7484c3bb34097571c1334174fb8b7408036Patch
- https://git.kernel.org/stable/c/c1f97152df8dfb17e855ddf0fc409b7bd13e9700Patch
FAQ
What is CVE-2026-31679?
CVE-2026-31679 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 S...
How severe is CVE-2026-31679?
CVE-2026-31679 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31679?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.