{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ccf74f2390d60a2f9a75ef496d2564abb478f46a"
            },
            {
              "fixed": "d9cbf7144ec589a3f0cc91f74a1a1af2d2b14afa"
            },
            {
              "fixed": "35f68f36d9883d56dec21cf85f7556d4657fc393"
            },
            {
              "fixed": "996c2104d0726a8fe584f85b3d6327197374a348"
            },
            {
              "fixed": "bc08c15746f25f41dd0508b25780d1e84acbb2ef"
            },
            {
              "fixed": "51cb9dcfdf9a1bccf312ab2ae4b62db629f7dcd5"
            },
            {
              "fixed": "4b5f8e608749b7e8fa386c6e4301cf9272595859"
            }
          ],
          "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": "6.1.176"
            }
          ],
          "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-2026-63945.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: serialize iso_sock_clear_timer with socket lock\n\niso_sock_close() calls iso_sock_clear_timer() before acquiring\nlock_sock(sk).\n\niso_sock_clear_timer() reads iso_pi(sk)-\u003econn twice without the\nsocket lock held:\n\n    if (!iso_pi(sk)-\u003econn)\n        return;\n    cancel_delayed_work(\u0026iso_pi(sk)-\u003econn-\u003etimeout_work);\n\nConcurrently, iso_conn_del() executes under lock_sock(sk) and calls\niso_chan_del(), which sets iso_pi(sk)-\u003econn to NULL and may result in\nthe final reference to the connection being dropped:\n\n    CPU0                         CPU1\n    ----                         ----\n    iso_sock_clear_timer()\n      if (conn != NULL) ...      lock_sock(sk)\n                                   iso_chan_del()\n                                   iso_pi(sk)-\u003econn = NULL\n      cancel_delayed_work(conn)  /* NULL deref or UAF */\n\niso_pi(sk)-\u003econn is not stable across the unlock window, causing a\nNULL pointer dereference or use-after-free.\n\nSerialize iso_sock_clear_timer() with the socket lock by moving it\ninside lock_sock()/release_sock(), matching the pattern used in\niso_conn_del() and all other call sites.",
  "id": "CVE-2026-63945",
  "modified": "2026-07-22T05:29:37.234084471Z",
  "published": "2026-07-19T14:55:39.859Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35f68f36d9883d56dec21cf85f7556d4657fc393"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b5f8e608749b7e8fa386c6e4301cf9272595859"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51cb9dcfdf9a1bccf312ab2ae4b62db629f7dcd5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/996c2104d0726a8fe584f85b3d6327197374a348"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc08c15746f25f41dd0508b25780d1e84acbb2ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d9cbf7144ec589a3f0cc91f74a1a1af2d2b14afa"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63945.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63945"
    },
    {
      "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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Bluetooth: ISO: serialize iso_sock_clear_timer with socket lock"
}