Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-31679

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
25/04/2026
Last modified:
27/04/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> openvswitch: validate MPLS set/set_masked payload length<br /> <br /> validate_set() accepted OVS_KEY_ATTR_MPLS as variable-sized payload for<br /> SET/SET_MASKED actions. In action handling, OVS expects fixed-size<br /> MPLS key data (struct ovs_key_mpls).<br /> <br /> Use the already normalized key_len (masked case included) and reject<br /> non-matching MPLS action key sizes.<br /> <br /> Reject invalid MPLS action payload lengths early.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x
7.10
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools