CVE-2026-31679 (GCVE-0-2026-31679)
Vulnerability from cvelistv5
Published
2026-04-25 08:46
Modified
2026-04-27 14:04
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 Version: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 Version: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 Version: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 Version: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 Version: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 Version: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 Version: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 |
||
{
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"versions": [
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"version": "5.5"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.168",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.131",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.80",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.21",
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},
{
"lessThanOrEqual": "6.19.*",
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"version": "6.19.11",
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},
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}
],
"cpeApplicability": [
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"nodes": [
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"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: validate MPLS set/set_masked payload length\n\nvalidate_set() accepted OVS_KEY_ATTR_MPLS as variable-sized payload for\nSET/SET_MASKED actions. In action handling, OVS expects fixed-size\nMPLS key data (struct ovs_key_mpls).\n\nUse the already normalized key_len (masked case included) and reject\nnon-matching MPLS action key sizes.\n\nReject invalid MPLS action payload lengths early."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-27T14:04:59.625Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f"
},
{
"url": "https://git.kernel.org/stable/c/4cae986225f8b8679ad86b924918e7d75a96aa61"
},
{
"url": "https://git.kernel.org/stable/c/8ed7b9930cbc3bc71f868fa79a68700ac88d586a"
},
{
"url": "https://git.kernel.org/stable/c/c1f97152df8dfb17e855ddf0fc409b7bd13e9700"
},
{
"url": "https://git.kernel.org/stable/c/98de18d327ef8cbbb704980e359e4872d8c28997"
},
{
"url": "https://git.kernel.org/stable/c/bd50c7484c3bb34097571c1334174fb8b7408036"
},
{
"url": "https://git.kernel.org/stable/c/2ca33b88a79ca42f017ae0f7011280325655438e"
},
{
"url": "https://git.kernel.org/stable/c/546b68ac893595877ffbd7751e5c55fd1c43ede6"
}
],
"title": "openvswitch: validate MPLS set/set_masked payload length",
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-31679",
"datePublished": "2026-04-25T08:46:55.584Z",
"dateReserved": "2026-03-09T15:48:24.130Z",
"dateUpdated": "2026-04-27T14:04:59.625Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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