{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8bcdc4f3a20be949df54b67e5ae2734daabb5792"
            },
            {
              "fixed": "b3793d7dccb192ffff29894d11824db6251acdd5"
            },
            {
              "fixed": "32d10c46bfde3e9b274e9e1bd6399d0ebea8f60f"
            },
            {
              "fixed": "730c7e5fea7f06e0cdf21c547222ec93234fd1d6"
            },
            {
              "fixed": "e8ad0d311e225939a9a6c745d6cc384c7364ec87"
            },
            {
              "fixed": "3a61bd9637f3d929aa846e4eb3d98b48c26fcb0e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.11.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68432.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: require CAP_NET_ADMIN in the device netns for changelink\n\nA tunnel changelink() operates on at most two netns, dev_net(dev) and\nthe sticky underlay netns vxlan-\u003enet. They differ once the device is\ncreated in or moved to a netns other than the one the request runs in.\nThe rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev),\nso a caller privileged there but not in vxlan-\u003enet can rewrite a vxlan\ndevice whose underlay lives in vxlan-\u003enet.\n\nvxlan_changelink() validates and applies the new configuration against\nvxlan-\u003enet (vxlan_config_validate(vxlan-\u003enet, ...)) and can reopen the\nunderlay socket in that netns, so the same reasoning as the tunnel\nchangelink series applies here.\n\nGate vxlan_changelink() with rtnl_dev_link_net_capable(), at the top of\nthe op before any attribute is parsed, matching ipgre_changelink() and\nthe rest of the \"require CAP_NET_ADMIN in the device netns for\nchangelink\" series.\n\nFound by 0sec automated security-research tooling (https://0sec.ai).",
  "id": "CVE-2026-68432",
  "modified": "2026-08-18T03:31:07.209716377Z",
  "published": "2026-08-12T00:07:18.806Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32d10c46bfde3e9b274e9e1bd6399d0ebea8f60f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a61bd9637f3d929aa846e4eb3d98b48c26fcb0e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/730c7e5fea7f06e0cdf21c547222ec93234fd1d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b3793d7dccb192ffff29894d11824db6251acdd5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e8ad0d311e225939a9a6c745d6cc384c7364ec87"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68432.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68432"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "vxlan: require CAP_NET_ADMIN in the device netns for changelink"
}