openvswitch: validate MPLS set/set_masked payload length
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.
CVE-2026-31679
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-31679
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
"lessThan": "68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f",
"versionType": "git"
},
{
"status": "affected",
"version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
"lessThan": "4cae986225f8b8679ad86b924918e7d75a96aa61",
"versionType": "git"
},
{
"status": "affected",
"version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
"lessThan": "8ed7b9930cbc3bc71f868fa79a68700ac88d586a",
"versionType": "git"
},
{
"status": "affected",
"version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
"lessThan": "c1f97152df8dfb17e855ddf0fc409b7bd13e9700",
"versionType": "git"
},
{
"status": "affected",
"version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
"lessThan": "98de18d327ef8cbbb704980e359e4872d8c28997",
"versionType": "git"
},
{
"status": "affected",
"version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
"lessThan": "bd50c7484c3bb34097571c1334174fb8b7408036",
"versionType": "git"
},
{
"status": "affected",
"version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
"lessThan": "2ca33b88a79ca42f017ae0f7011280325655438e",
"versionType": "git"
},
{
"status": "affected",
"version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
"lessThan": "546b68ac893595877ffbd7751e5c55fd1c43ede6",
"versionType": "git"
}
],
"programFiles": [
"net/openvswitch/flow_netlink.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.5"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.168",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.131",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.80",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.21",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.11",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/openvswitch/flow_netlink.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-31679
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #39951 · Revision 1
- Added to Heist Feed
- Publisher date