CVE-2026-31679

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

25/04/2026

Last modified:

06/05/2026

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.

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

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.253 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.203 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.168 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.131 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.80 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.18.21 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.19 (including)	6.19.11 (excluding)
cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc2::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc3::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc4::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc5::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-31679

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools