# CVE-2026-31679

> Vulnerability · severity: **HIGH** (CVSS 7.1).

## 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.

## Key facts

- **CVE ID:** CVE-2026-31679
- **Published:** 2026-04-25
- **CVSS severity:** HIGH
- **CVSS base score:** 7.1
- **CWE codes:** NVD-CWE-noinfo

## Affected products

- `linux:linux_kernel`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-31679

## Citation

> AI Analytics. CVE-2026-31679. Retrieved 2026-07-23 from https://api.ai-analytics.org/cve/CVE-2026-31679. Derived from NIST NVD. Licensed CC0.

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