{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "00e907127e6f86d0f9b122d9b4347a8aa09a8b61"
            },
            {
              "fixed": "d6207326b4ca0ae1041281b6af9df53f8080669a"
            },
            {
              "fixed": "11b429b84c87cb5a0152f14e7d6cb649ed363901"
            },
            {
              "fixed": "c20d983968f239574290cf804a58cde18ad1c559"
            },
            {
              "fixed": "0337cdba0c477f176c0459bed012109453184573"
            },
            {
              "fixed": "dfa0b2bbc5e50119f89c6b5407faa5ed86dfa7c5"
            },
            {
              "fixed": "35a967ff8b24db09ee429c39c5b5e6571639997d"
            },
            {
              "fixed": "1741378a7a83dfd8e53a9196730df709b903cd33"
            },
            {
              "fixed": "dc175389b18c29a5303ee83169ec653adfae3e17"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.9.0"
            },
            {
              "fixed": "5.10.266"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.217"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.184"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "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-2026-74436.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: serialize kernel accept preallocation with socket teardown\n\nrxrpc_kernel_charge_accept() reads rx-\u003ebacklog without any\nsocket/backlog synchronization and passes that raw pointer into\nrxrpc_service_prealloc_one(). A concurrent rxrpc_discard_prealloc()\nsets rx-\u003ebacklog = NULL and frees the backlog rings, so a kernel\npreallocation worker can keep using a freed struct rxrpc_backlog\nwhile updating *_backlog_head/tail and array slots.\n\nSerialize the state check and backlog lookup with the socket lock,\nand reject kernel preallocation once teardown has disabled\nlistening or discarded the service backlog.",
  "id": "CVE-2026-74436",
  "modified": "2026-08-25T03:51:23.472020857Z",
  "published": "2026-08-15T05:59:34.687Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0337cdba0c477f176c0459bed012109453184573"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/11b429b84c87cb5a0152f14e7d6cb649ed363901"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1741378a7a83dfd8e53a9196730df709b903cd33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35a967ff8b24db09ee429c39c5b5e6571639997d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c20d983968f239574290cf804a58cde18ad1c559"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6207326b4ca0ae1041281b6af9df53f8080669a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc175389b18c29a5303ee83169ec653adfae3e17"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfa0b2bbc5e50119f89c6b5407faa5ed86dfa7c5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74436.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74436"
    },
    {
      "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": "rxrpc: serialize kernel accept preallocation with socket teardown"
}