{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.176-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.94-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.12-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: ISO: serialize iso_sock_clear_timer with socket lock  iso_sock_close() calls iso_sock_clear_timer() before acquiring lock_sock(sk).  iso_sock_clear_timer() reads iso_pi(sk)-\u003econn twice without the socket lock held:      if (!iso_pi(sk)-\u003econn)         return;     cancel_delayed_work(\u0026iso_pi(sk)-\u003econn-\u003etimeout_work);  Concurrently, iso_conn_del() executes under lock_sock(sk) and calls iso_chan_del(), which sets iso_pi(sk)-\u003econn to NULL and may result in the final reference to the connection being dropped:      CPU0                         CPU1     ----                         ----     iso_sock_clear_timer()       if (conn != NULL) ...      lock_sock(sk)                                    iso_chan_del()                                    iso_pi(sk)-\u003econn = NULL       cancel_delayed_work(conn)  /* NULL deref or UAF */  iso_pi(sk)-\u003econn is not stable across the unlock window, causing a NULL pointer dereference or use-after-free.  Serialize iso_sock_clear_timer() with the socket lock by moving it inside lock_sock()/release_sock(), matching the pattern used in iso_conn_del() and all other call sites.",
  "id": "DEBIAN-CVE-2026-63945",
  "modified": "2026-09-14T16:47:33.365655765Z",
  "published": "2026-07-19T16:17:13.107Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-63945"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-63945"
  ]
}