CVE-2026-31679

HIGH

openvswitch: validate MPLS set/set_masked payload length

Title source: cna
STIX 2.1

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.

References (8)

Core 8

Scores

CVSS v3 7.1
EPSS 0.0012
EPSS Percentile 2.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Details

Status published
Products (27)
linux/Kernel 5.11.0 - 5.15.203linux
linux/Kernel 5.16.0 - 6.1.168linux
linux/Kernel 5.5.0 - 5.10.253linux
linux/Kernel 6.13.0 - 6.18.21linux
linux/Kernel 6.19.0 - 6.19.11linux
linux/Kernel 6.2.0 - 6.6.131linux
linux/Kernel 6.7.0 - 6.12.80linux
Linux/Linux < 5.5
Linux/Linux 5.10.253 - 5.10.*
Linux/Linux 5.15.203 - 5.15.*
... and 17 more
Published Apr 25, 2026
Tracked Since Apr 25, 2026