{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a58d0f5dac322e16cc75334d000666512341bde5"
            },
            {
              "fixed": "16d89a63e08280abeef7218970a3bbd7ca62b021"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "dc26097bdb864a0d5955b9a25e43376ffc1af99b"
            },
            {
              "fixed": "82e982f54f962f72646868ddbb2c3bd9ea178568"
            },
            {
              "fixed": "3c3d5f85db80145636bb991a6005e2760012b985"
            },
            {
              "fixed": "200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "f53e7489273dc2bb307bf50f319b3762d45534f0"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.12.2"
            },
            {
              "fixed": "6.12.103"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.11.11"
            },
            {
              "fixed": "6.12"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.103"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.44"
            },
            {
              "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-2026-74535.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: avoid deadlocks in iso_sock_timeout\n\niso_sock_timeout() takes lock_sock, so sync disabling the timer while\nholding that lock may deadlock.\n\niso_sock_timeout() may also run concurrently with iso_conn_del(), which\nleads to UAF\n\n        [Task 1]                      [Task hdev-\u003eworkqueue]\n        iso_sock_timeout              iso_conn_del\n          iso_conn_hold_unless_zero     iso_chan_del\n                           `------------\u003e iso_conn_put\n                                      caller frees hcon\n          iso_conn_put\n            iso_conn_free\n              conn-\u003ehcon-\u003eiso_data = NULL; /* UAF */\n\nFix the deadlock by removing the disable from the lock_sock sections.\nMove the timer from iso_conn to iso_pinfo to decouple it from iso_conn\nwhich may need to be freed in lock_sock section. Convert some of the\nclear_timer to disable_timer.",
  "id": "CVE-2026-74535",
  "modified": "2026-08-18T03:31:01.534401818Z",
  "published": "2026-08-15T12:27:48.449Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16d89a63e08280abeef7218970a3bbd7ca62b021"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c3d5f85db80145636bb991a6005e2760012b985"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82e982f54f962f72646868ddbb2c3bd9ea178568"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74535.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74535"
    },
    {
      "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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Bluetooth: ISO: avoid deadlocks in iso_sock_timeout"
}