{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ccf74f2390d60a2f9a75ef496d2564abb478f46a"
            },
            {
              "fixed": "96ed3c772c08e7a91c399567f412618e43231023"
            },
            {
              "fixed": "e76a0ae6542ae43241b2147bacf4990e7ae5316a"
            },
            {
              "fixed": "e30e5ca63c8fbe3cd505fbb419bb547760cda633"
            },
            {
              "fixed": "ce57442a379212fe3fda59c9437ee8217eceb5b1"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.12.103"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.44"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74536.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix leaking sk after socket release\n\niso_sock_kill() tests !sock_flag(sk, SOCK_ZAPPED) || sk-\u003esk_socket ||\nsock_flag(sk, SOCK_DEAD) for early return, but this is always true since\nsock_orphan(sk) sets SOCK_DEAD, so the sk reference released by socket\nalways leaks, iso_sock_destruct is never called.\n\nThe socket reference also leaks when __iso_sock_close() does not set\nSOCK_ZAPPED, since iso_conn_del() does not call iso_sock_kill() after\nzapping.\n\nFix by replacing SOCK_DEAD by BT_SK_KILLED flag that is not used for\nsomething else, and lock_sock to ensure iso_sock_kill() puts sk only\nafter socket release only once. Release and iso_conn_del may run\nconcurrently. Call iso_sock_kill() from iso_conn_del() to clean sk up\nafter zapping.\n\nRemove call to iso_sock_kill() from iso_sock_close(), as it's generally\nno-op there.",
  "id": "CVE-2026-74536",
  "modified": "2026-08-18T03:31:07.722177707Z",
  "published": "2026-08-15T12:27:49.054Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96ed3c772c08e7a91c399567f412618e43231023"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce57442a379212fe3fda59c9437ee8217eceb5b1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e30e5ca63c8fbe3cd505fbb419bb547760cda633"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e76a0ae6542ae43241b2147bacf4990e7ae5316a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74536.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74536"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "Bluetooth: ISO: fix leaking sk after socket release"
}