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HIGHCVE-2026-31679Published Modified CNA Linux

CVE-2026-31679: openvswitch: validate MPLS set/set_masked payload length

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.

Metrics

CVSS v3.1
7.1
Severity
HIGH
Fixed in
0
Affected Products
2

Fix available

02ca33b88a79ca42f017ae0f7011280325655438e4cae986225f8b8679ad86b924918e7d75a96aa615.10.2535.15.203546b68ac893595877ffbd7751e5c55fd1c43ede66.1.1686.6.1316.12.806.18.216.19.1168f32ef0683c8d1c05cd2e4f16818fa63ff59c6f7.08ed7b9930cbc3bc71f868fa79a68700ac88d586a98de18d327ef8cbbb704980e359e4872d8c28997bd50c7484c3bb34097571c1334174fb8b7408036c1f97152df8dfb17e855ddf0fc409b7bd13e9700
Affected packages
  • Linux / Linux
    < 68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f (from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3) · < 4cae986225f8b8679ad86b924918e7d75a96aa61 (from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3) · < 8ed7b9930cbc3bc71f868fa79a68700ac88d586a (from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3) · < c1f97152df8dfb17e855ddf0fc409b7bd13e9700 (from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3) · < 98de18d327ef8cbbb704980e359e4872d8c28997 (from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3) · < bd50c7484c3bb34097571c1334174fb8b7408036 (from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3)
  • Linux / Linux
    5.5
    Fixed in 0, 5.10.253, 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11, 7.0
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
References