Linux Kernel up to 6.19.10 openvswitch validate_set memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.19.10. Impacted is the function validate_set of the component openvswitch. Executing a manipulation can lead to memory corruption. The identification of this vulnerability is CVE-2026-31679. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.10. It has been declared as critical. This vulnerability affects the function validate_set of the component openvswitch. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-31679 since 03/09/2026. The exploitation appears to be easy. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/26/2026).

The vulnerability scanner Nessus provides a plugin with the ID 310338 (Linux Distros Unpatched Vulnerability : CVE-2026-31679), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.253, 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21 or 6.19.11 eliminates this vulnerability. Applying the patch 68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f/4cae986225f8b8679ad86b924918e7d75a96aa61/8ed7b9930cbc3bc71f868fa79a68700ac88d586a/c1f97152df8dfb17e855ddf0fc409b7bd13e9700/98de18d327ef8cbbb704980e359e4872d8c28997/bd50c7484c3bb34097571c1334174fb8b7408036/2ca33b88a79ca42f017ae0f7011280325655438e/546b68ac893595877ffbd7751e5c55fd1c43ede6 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (310338) and EUVD (EUVD-2026-25646). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 310338
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-31679

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.253/5.15.203/6.1.168/6.6.131/6.12.80/6.18.21/6.19.11
Patch: 68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f/4cae986225f8b8679ad86b924918e7d75a96aa61/8ed7b9930cbc3bc71f868fa79a68700ac88d586a/c1f97152df8dfb17e855ddf0fc409b7bd13e9700/98de18d327ef8cbbb704980e359e4872d8c28997/bd50c7484c3bb34097571c1334174fb8b7408036/2ca33b88a79ca42f017ae0f7011280325655438e/546b68ac893595877ffbd7751e5c55fd1c43ede6

Timelineinfo

03/09/2026 CVE reserved
04/25/2026 +46 days Advisory disclosed
04/25/2026 +0 days VulDB entry created
04/26/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31679 (🔒)
GCVE (CVE): GCVE-0-2026-31679
GCVE (VulDB): GCVE-100-359584
EUVD: 🔒

Entryinfo

Created: 04/25/2026 11:33
Updated: 04/26/2026 06:03
Changes: 04/25/2026 11:33 (59), 04/25/2026 13:02 (1), 04/26/2026 06:03 (2)
Complete: 🔍
Cache ID: 216::103

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