CVE-2026-80666

{
  "id": "CVE-2026-80666",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "e6720779ae612a14ac4ba7fe4fd5b27d900d932c",
              "lessThan": "da4d8eea0c5f33ea35c0e1d9e5f3e439f3b987ce",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e6720779ae612a14ac4ba7fe4fd5b27d900d932c",
              "lessThan": "a50da115b5888062d32c86a548a29b4e2559d7ec",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e6720779ae612a14ac4ba7fe4fd5b27d900d932c",
              "lessThan": "0f8a5dcc66648b6e1458a9f3ba4c5a0463a228fc",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/bluetooth/sco.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.13",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/bluetooth/sco.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-28T08:16:51.847",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0f8a5dcc66648b6e1458a9f3ba4c5a0463a228fc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a50da115b5888062d32c86a548a29b4e2559d7ec",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/da4d8eea0c5f33ea35c0e1d9e5f3e439f3b987ce",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: sco: Fix a race condition in sco_sock_timeout()\n\nsco_sock_timeout() runs asynchronously and lock_sock(sk). If the socket\nis closing while the timer is running, it holds the same lock\n(lock_sock(sk)) twice, leading to a deadlock.\n\nCPU 0                      CPU 1\n====================       ======================\nsco_sock_close()\n                           sco_sock_timeout()\nlock_sock(sk) // <-- LOCK\n  __sco_sock_close()\n    sco_chan_del()\n      sco_conn_put()\n\t      sco_conn_free()\n\t        disable_delayed_work_sync()\n\t                           lock(sk) // <-- SAME LOCK\n\nFix this by moving disable_delayed_work_sync() outside of lock_sock(sk),\nensuring that no lock_sock(sk) is held before sco_sock_timeout().\n\nLockdep splat:\n\nWARNING: possible circular locking dependency detected\n6.13.0-rc4 #7 Not tainted\n\nsyz-executor292/9514 is trying to acquire lock:\nffff8881115d5070 ((work_completion)(&(&conn->timeout_work)->work)){+.+.}-{0:0}, at: rcu_lock_acquire sect/v6.13-rc4/./include/linux/rcupdate.h:337 [inline]\nffff8881115d5070 ((work_completion)(&(&conn->timeout_work)->work)){+.+.}-{0:0}, at: rcu_read_lock sect/v6.13-rc4/./include/linux/rcupdate.h:849 [inline]\nffff8881115d5070 ((work_completion)(&(&conn->timeout_work)->work)){+.+.}-{0:0}, at: start_flush_work sect/v6.13-rc4/kernel/workqueue.c:4137 [inline]\nffff8881115d5070 ((work_completion)(&(&conn->timeout_work)->work)){+.+.}-{0:0}, at: __flush_work+0xd1/0xc40 sect/v6.13-rc4/kernel/workqueue.c:4195\n\nbut task is already holding lock:\nffff88807db3a258 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: lock_sock sect/v6.13-rc4/./include/net/sock.h:1623 [inline]\nffff88807db3a258 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_sock_close+0x25/0x100 sect/v6.13-rc4/net/bluetooth/sco.c:524\n\nwhich lock already depends on the new lock.\n\nthe existing dependency chain (in reverse order) is:\n\n-> #1 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}:\n       lock_acquire+0x1c4/0x520 sect/v6.13-rc4/kernel/locking/lockdep.c:5849\n       lock_sock_nested+0x48/0x130 sect/v6.13-rc4/net/core/sock.c:3622\n       lock_sock sect/v6.13-rc4/./include/net/sock.h:1623 [inline]\n       sco_sock_timeout+0xbe/0x270 sect/v6.13-rc4/net/bluetooth/sco.c:158\n       process_one_work sect/v6.13-rc4/kernel/workqueue.c:3229 [inline]\n       process_scheduled_works+0xa99/0x18f0 sect/v6.13-rc4/kernel/workqueue.c:3310\n       worker_thread+0x8a9/0xd80 sect/v6.13-rc4/kernel/workqueue.c:3391\n       kthread+0x2c6/0x360 sect/v6.13-rc4/kernel/kthread.c:389\n       ret_from_fork+0x4e/0x80 sect/v6.13-rc4/arch/x86/kernel/process.c:147\n       ret_from_fork_asm+0x1a/0x30 sect/v6.13-rc4/arch/x86/entry/entry_64.S:244\n\n-> #0 ((work_completion)(&(&conn->timeout_work)->work)){+.+.}-{0:0}:\n       check_prev_add sect/v6.13-rc4/kernel/locking/lockdep.c:3161 [inline]\n       check_prevs_add sect/v6.13-rc4/kernel/locking/lockdep.c:3280 [inline]\n       validate_chain+0x1888/0x5760 sect/v6.13-rc4/kernel/locking/lockdep.c:3904\n       __lock_acquire+0x13b4/0x2120 sect/v6.13-rc4/kernel/locking/lockdep.c:5226\n       lock_acquire+0x1c4/0x520 sect/v6.13-rc4/kernel/locking/lockdep.c:5849\n       touch_work_lockdep_map sect/v6.13-rc4/kernel/workqueue.c:3909 [inline]\n       start_flush_work sect/v6.13-rc4/kernel/workqueue.c:4163 [inline]\n       __flush_work+0x70f/0xc40 sect/v6.13-rc4/kernel/workqueue.c:4195\n       __cancel_work_sync sect/v6.13-rc4/kernel/workqueue.c:4351 [inline]\n       disable_delayed_work_sync+0xbb/0xf0 sect/v6.13-rc4/kernel/workqueue.c:4514\n       sco_conn_free sect/v6.13-rc4/net/bluetooth/sco.c:95 [inline]\n       kref_put sect/v6.13-rc4/./include/linux/kref.h:65 [inline]\n       sco_conn_put+0x18f/0x270 sect/v6.13-rc4/net/bluetooth/sco.c:107\n       sco_chan_del+0xe2/0x210 sect/v6.13-rc4/net/bluetooth/sco.c:236\n       sco_sock_close+0x8f/0x100 sect/v6.13-rc4/net/bluetooth/sco.c:526\n       sco_sock_release+0x62/0x2d0 sect/v6.13-rc4/net/blueto\n---truncated---"
    }
  ],
  "lastModified": "2026-08-28T08:16:51.847",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}