High 7.1Published Apr 25, 2026

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

Updated under an hour ago (Oct 28, 2026, 2:50 AM ET)

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Exploited in the last 30 days

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: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 before 68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f; from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 before 4cae986225f8b8679ad86b924918e7d75a96aa61; from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 before 8ed7b9930cbc3bc71f868fa79a68700ac88d586a; from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 before c1f97152df8dfb17e855ddf0fc409b7bd13e9700; from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 before 98de18d327ef8cbbb704980e359e4872d8c28997; from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 before bd50c7484c3bb34097571c1334174fb8b7408036; from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 before 2ca33b88a79ca42f017ae0f7011280325655438e; from fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 before 546b68ac893595877ffbd7751e5c55fd1c43ede6	CNA record
linux linux_kernel linux:linux_kernel	from 5.5 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.131; from 6.7 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 7.0; and 4 more ranges	NVD

References

References

https://git.kernel.org/stable/c/68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f	patch
https://git.kernel.org/stable/c/4cae986225f8b8679ad86b924918e7d75a96aa61	patch
https://git.kernel.org/stable/c/8ed7b9930cbc3bc71f868fa79a68700ac88d586a	patch
https://git.kernel.org/stable/c/c1f97152df8dfb17e855ddf0fc409b7bd13e9700	patch
https://git.kernel.org/stable/c/98de18d327ef8cbbb704980e359e4872d8c28997	patch
https://git.kernel.org/stable/c/bd50c7484c3bb34097571c1334174fb8b7408036	patch
https://git.kernel.org/stable/c/2ca33b88a79ca42f017ae0f7011280325655438e	patch
https://git.kernel.org/stable/c/546b68ac893595877ffbd7751e5c55fd1c43ede6	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.