{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-80666",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80666",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-28T06:49:08.684Z",
    "updatedAt": "2026-08-28T06:49:08.684Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Bluetooth: sco: Fix a race condition in sco_sock_timeout()",
      "summary": "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---",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "e6720779ae612a14ac4ba7fe4fd5b27d900d932c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "da4d8eea0c5f33ea35c0e1d9e5f3e439f3b987ce"
            },
            {
              "version": "e6720779ae612a14ac4ba7fe4fd5b27d900d932c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a50da115b5888062d32c86a548a29b4e2559d7ec"
            },
            {
              "version": "e6720779ae612a14ac4ba7fe4fd5b27d900d932c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0f8a5dcc66648b6e1458a9f3ba4c5a0463a228fc"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.13"
            },
            {
              "version": "6.18.40",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}