Answer in brief
CVE-2026-31679 records a High severity (CVSS 7.1) vulnerability in openvswitch: validate MPLS set/set_masked payload length. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 <68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f || >=fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 <4cae986225f8b8679ad86b924918e7d75a96aa61 || >=fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 <8ed7b9930cbc3bc71f868fa79a68700ac88d586a || >=fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 <c1f97152df8dfb17e855ddf0fc409b7bd13e9700 || >=fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 <98de18d327ef8cbbb704980e359e4872d8c28997 || >=fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 <bd50c7484c3bb34097571c1334174fb8b7408036 || >=fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 <2ca33b88a79ca42f017ae0f7011280325655438e || >=fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 <546b68ac893595877ffbd7751e5c55fd1c43ede6 | 68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f, 4cae986225f8b8679ad86b924918e7d75a96aa61, 8ed7b9930cbc3bc71f868fa79a68700ac88d586a, c1f97152df8dfb17e855ddf0fc409b7bd13e9700, 98de18d327ef8cbbb704980e359e4872d8c28997, bd50c7484c3bb34097571c1334174fb8b7408036, 2ca33b88a79ca42f017ae0f7011280325655438e, 546b68ac893595877ffbd7751e5c55fd1c43ede6 |
| Linux/Linuxgeneric | 5.5 | Not reported |
Published upstream
Apr 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.