{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5602c48cf87562c2f95b831d690631935e834295"
            },
            {
              "fixed": "9c58c729d32e7cea5772cc44929c6cd61e5a31cd"
            },
            {
              "fixed": "f79c80f173fda9545b220c1f094b65fc06c252d0"
            },
            {
              "fixed": "08f40c0d23c67c3aa4224c3311e134999c721fb4"
            },
            {
              "fixed": "4a8cde6f7281ea2c4c290f9ad9923b3631defceb"
            },
            {
              "fixed": "ef44dac2a37f86eeae6b88ed10a6d60b35387dfd"
            },
            {
              "fixed": "30a45c0bffdd62350261e2f2689fdba426a33578"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.7.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74406.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().\n\nudp_tunnel_sock_release() could set sk-\u003esk_user_data to NULL\nwhile vxlan_gro_prepare_receive() is running.\n\nLet's check if rcu_dereference_sk_user_data() is NULL after\nskb_gro_remcsum_init().",
  "id": "CVE-2026-74406",
  "modified": "2026-08-18T03:31:15.615431125Z",
  "published": "2026-08-15T05:59:15.385Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08f40c0d23c67c3aa4224c3311e134999c721fb4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30a45c0bffdd62350261e2f2689fdba426a33578"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4a8cde6f7281ea2c4c290f9ad9923b3631defceb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c58c729d32e7cea5772cc44929c6cd61e5a31cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef44dac2a37f86eeae6b88ed10a6d60b35387dfd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f79c80f173fda9545b220c1f094b65fc06c252d0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74406.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74406"
    },
    {
      "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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive()."
}