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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 affected < 68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f
fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 affected < 4cae986225f8b8679ad86b924918e7d75a96aa61
fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 affected < 8ed7b9930cbc3bc71f868fa79a68700ac88d586a
fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 affected < c1f97152df8dfb17e855ddf0fc409b7bd13e9700
fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 affected < 98de18d327ef8cbbb704980e359e4872d8c28997
fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 affected < bd50c7484c3bb34097571c1334174fb8b7408036
fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 affected < 2ca33b88a79ca42f017ae0f7011280325655438e
fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 affected < 546b68ac893595877ffbd7751e5c55fd1c43ede6
Linux Linux affected
Version Status Constraints
5.5 affected —
0 unaffected < 5.5
5.10.253 unaffected ≤ 5.10.*
5.15.203 unaffected ≤ 5.15.*
6.1.168 unaffected ≤ 6.1.*
6.6.131 unaffected ≤ 6.6.*
6.12.80 unaffected ≤ 6.12.*
6.18.21 unaffected ≤ 6.18.*
6.19.11 unaffected ≤ 6.19.*
7.0 unaffected ≤ *

No data.

No data.

No data.

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/2ca33b88a79ca42f017ae0f7011280325655438e cve-icon cve-icon
https://git.kernel.org/stable/c/4cae986225f8b8679ad86b924918e7d75a96aa61 cve-icon cve-icon
https://git.kernel.org/stable/c/546b68ac893595877ffbd7751e5c55fd1c43ede6 cve-icon cve-icon
https://git.kernel.org/stable/c/68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f cve-icon cve-icon
https://git.kernel.org/stable/c/8ed7b9930cbc3bc71f868fa79a68700ac88d586a cve-icon cve-icon
https://git.kernel.org/stable/c/98de18d327ef8cbbb704980e359e4872d8c28997 cve-icon cve-icon
https://git.kernel.org/stable/c/bd50c7484c3bb34097571c1334174fb8b7408036 cve-icon cve-icon
https://git.kernel.org/stable/c/c1f97152df8dfb17e855ddf0fc409b7bd13e9700 cve-icon cve-icon
History

Sat, 25 Apr 2026 09:00:00 +0000

Type Values Removed Values Added
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.
Title openvswitch: validate MPLS set/set_masked payload length
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-04-25T08:46:55.584Z

Reserved: 2026-03-09T15:48:24.130Z

Link: CVE-2026-31679

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-25T09:16:01.550

Modified: 2026-04-25T09:16:01.550

Link: CVE-2026-31679

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.