{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3"
            },
            {
              "fixed": "68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f"
            },
            {
              "fixed": "4cae986225f8b8679ad86b924918e7d75a96aa61"
            },
            {
              "fixed": "8ed7b9930cbc3bc71f868fa79a68700ac88d586a"
            },
            {
              "fixed": "c1f97152df8dfb17e855ddf0fc409b7bd13e9700"
            },
            {
              "fixed": "98de18d327ef8cbbb704980e359e4872d8c28997"
            },
            {
              "fixed": "bd50c7484c3bb34097571c1334174fb8b7408036"
            },
            {
              "fixed": "2ca33b88a79ca42f017ae0f7011280325655438e"
            },
            {
              "fixed": "546b68ac893595877ffbd7751e5c55fd1c43ede6"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.5.0"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.168"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.131"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.80"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.21"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31679.json"
  },
  "details": "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.",
  "id": "CVE-2026-31679",
  "modified": "2026-07-08T05:36:07.709708911Z",
  "published": "2026-04-25T08:46:55.584Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2ca33b88a79ca42f017ae0f7011280325655438e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4cae986225f8b8679ad86b924918e7d75a96aa61"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/546b68ac893595877ffbd7751e5c55fd1c43ede6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/68f32ef0683c8d1c05cd2e4f16818fa63ff59c6f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ed7b9930cbc3bc71f868fa79a68700ac88d586a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98de18d327ef8cbbb704980e359e4872d8c28997"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd50c7484c3bb34097571c1334174fb8b7408036"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c1f97152df8dfb17e855ddf0fc409b7bd13e9700"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31679.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31679"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "openvswitch: validate MPLS set/set_masked payload length"
}