openvswitch: validate MPLS set/set_masked payload length

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Summary

CVECVE-2026-31679
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-25 09:16:01 UTC
Updated2026-05-06 21:25:09 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS: 0.000240000 probability, percentile 0.067850000 (date 2026-04-27)

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f git Not specified
CNA Linux Linux affected fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 4cae986225f8b8679ad86b924918e7d75a96aa61 git Not specified
CNA Linux Linux affected fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 8ed7b9930cbc3bc71f868fa79a68700ac88d586a git Not specified
CNA Linux Linux affected fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 c1f97152df8dfb17e855ddf0fc409b7bd13e9700 git Not specified
CNA Linux Linux affected fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 98de18d327ef8cbbb704980e359e4872d8c28997 git Not specified
CNA Linux Linux affected fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 bd50c7484c3bb34097571c1334174fb8b7408036 git Not specified
CNA Linux Linux affected fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 2ca33b88a79ca42f017ae0f7011280325655438e git Not specified
CNA Linux Linux affected fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 546b68ac893595877ffbd7751e5c55fd1c43ede6 git Not specified
CNA Linux Linux affected 5.5 Not specified
CNA Linux Linux unaffected 5.5 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.131 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.80 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.21 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.11 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c1f97152df8dfb17e855ddf0fc409b7bd13e9700 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/546b68ac893595877ffbd7751e5c55fd1c43ede6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/bd50c7484c3bb34097571c1334174fb8b7408036 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4cae986225f8b8679ad86b924918e7d75a96aa61 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8ed7b9930cbc3bc71f868fa79a68700ac88d586a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/98de18d327ef8cbbb704980e359e4872d8c28997 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2ca33b88a79ca42f017ae0f7011280325655438e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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