High severity7.1NVD Advisory· Published Apr 25, 2026· Updated May 6, 2026
CVE-2026-31679
CVE-2026-31679
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
6cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 5 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=5.5,<5.10.253
- 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:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/2ca33b88a79ca42f017ae0f7011280325655438envdPatch
- git.kernel.org/stable/c/4cae986225f8b8679ad86b924918e7d75a96aa61nvdPatch
- git.kernel.org/stable/c/546b68ac893595877ffbd7751e5c55fd1c43ede6nvdPatch
- git.kernel.org/stable/c/68f32ef0683c8d1c05cd2e4f16818fa63ff59c6fnvdPatch
- git.kernel.org/stable/c/8ed7b9930cbc3bc71f868fa79a68700ac88d586anvdPatch
- git.kernel.org/stable/c/98de18d327ef8cbbb704980e359e4872d8c28997nvdPatch
- git.kernel.org/stable/c/bd50c7484c3bb34097571c1334174fb8b7408036nvdPatch
- git.kernel.org/stable/c/c1f97152df8dfb17e855ddf0fc409b7bd13e9700nvdPatch
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