{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7b3801927e52f8621de311277f7fc727635019e7"
            },
            {
              "fixed": "7ee59eda8820b758ed29e1cd3222359c7b97302c"
            },
            {
              "fixed": "2df7059a18afb7d3aee6c36cad5d371c198111d4"
            },
            {
              "fixed": "8dfabcba6a943a7a02ebe1e1637c361ba96acbaa"
            },
            {
              "fixed": "48ce101cd630d6745b6923b5bad8358bc4c119da"
            },
            {
              "fixed": "55ddfc41451f01c588089cd74957a05311b6f202"
            },
            {
              "fixed": "9f7ebb45a83afc3216e855e57d51bb4bc9b5232e"
            },
            {
              "fixed": "9f67a36e91bb50d358760f381f233913fe5c09f8"
            },
            {
              "fixed": "c16f74dc1d75d0e2e7670076d5375deda110ebeb"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.6.0"
            },
            {
              "fixed": "5.10.259"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.210"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.93"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.35"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63919.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: input: hold netns during deferred transport reinjection\n\nTransport-mode reinjection stores a struct net pointer in skb-\u003ecb and\nuses it later from xfrm_trans_reinject(). That pointer must stay valid\nuntil the deferred callback runs.\n\nTake a netns reference when queueing deferred reinjection work and drop\nit after the callback completes. Use maybe_get_net() so the queueing\npath does not revive a namespace that is already being torn down.\n\nThis keeps the existing workqueue design and fixes the netns lifetime\nhandling in one place for all users of xfrm_trans_queue_net().",
  "id": "CVE-2026-63919",
  "modified": "2026-07-22T05:29:50.331224087Z",
  "published": "2026-07-19T14:55:22.121Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2df7059a18afb7d3aee6c36cad5d371c198111d4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48ce101cd630d6745b6923b5bad8358bc4c119da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55ddfc41451f01c588089cd74957a05311b6f202"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ee59eda8820b758ed29e1cd3222359c7b97302c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8dfabcba6a943a7a02ebe1e1637c361ba96acbaa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f67a36e91bb50d358760f381f233913fe5c09f8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f7ebb45a83afc3216e855e57d51bb4bc9b5232e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c16f74dc1d75d0e2e7670076d5375deda110ebeb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63919.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63919"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "xfrm: input: hold netns during deferred transport reinjection"
}