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openvswitch: validate MPLS set/set_masked payload length

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

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
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Publisher date
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