CVE-2022-49474 (GCVE-0-2022-49474)
Vulnerability from cvelistv5
Published
2025-02-26 02:13
Modified
2026-08-05 08:55
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix dangling sco_conn and use-after-free in sco_sock_timeout Connecting the same socket twice consecutively in sco_sock_connect() could lead to a race condition where two sco_conn objects are created but only one is associated with the socket. If the socket is closed before the SCO connection is established, the timer associated with the dangling sco_conn object won't be canceled. As the sock object is being freed, the use-after-free problem happens when the timer callback function sco_sock_timeout() accesses the socket. Here's the call trace: dump_stack+0x107/0x163 ? refcount_inc+0x1c/ print_address_description.constprop.0+0x1c/0x47e ? refcount_inc+0x1c/0x7b kasan_report+0x13a/0x173 ? refcount_inc+0x1c/0x7b check_memory_region+0x132/0x139 refcount_inc+0x1c/0x7b sco_sock_timeout+0xb2/0x1ba process_one_work+0x739/0xbd1 ? cancel_delayed_work+0x13f/0x13f ? __raw_spin_lock_init+0xf0/0xf0 ? to_kthread+0x59/0x85 worker_thread+0x593/0x70e kthread+0x346/0x35a ? drain_workqueue+0x31a/0x31a ? kthread_bind+0x4b/0x4b ret_from_fork+0x1f/0x30
References
Impacted products
Vendor Product Version
Linux Linux Version: 22c66af08230a7030bdb88accffaec3424695631
Version: 0115a66ebb44bd9127ccb58cf43ed23c795eb1f0
Version: bc4b08383046f3282b6fa58cfcef05bd13e52b93
Version: 5ccb04c6e1fb7b97fa2e1785b67c3a1cb3527ef7
Version: 059c2c09f4b7f97711d0d8eaa0b9877f5e7d0a75
Version: e1dee2c1de2b4dd00eb44004a4bda6326ed07b59
Version: e1dee2c1de2b4dd00eb44004a4bda6326ed07b59
Version: e1dee2c1de2b4dd00eb44004a4bda6326ed07b59
Version: e1dee2c1de2b4dd00eb44004a4bda6326ed07b59
Version: 98ae477ed1540d3acbbf44d88ee237ad64275158
Version: f0c389e23e2475e5837716a629c81b7a9d90cc94
Version: 0b9da4bde0d59c61b3675bdd80a05a726beb875a
Version: 4.9.283   ≤
Version: 4.14.247   ≤
Version: 4.19.207   ≤
Version: 5.4.146   ≤
Version: 5.10.65   ≤
Version: 4.4.284   ≤
Version: 5.13.17   ≤
Version: 5.14.4   ≤
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix dangling sco_conn and use-after-free in sco_sock_timeout\n\nConnecting the same socket twice consecutively in sco_sock_connect()\ncould lead to a race condition where two sco_conn objects are created\nbut only one is associated with the socket. If the socket is closed\nbefore the SCO connection is established, the timer associated with the\ndangling sco_conn object won\u0027t be canceled. As the sock object is being\nfreed, the use-after-free problem happens when the timer callback\nfunction sco_sock_timeout() accesses the socket. Here\u0027s the call trace:\n\ndump_stack+0x107/0x163\n? refcount_inc+0x1c/\nprint_address_description.constprop.0+0x1c/0x47e\n? refcount_inc+0x1c/0x7b\nkasan_report+0x13a/0x173\n? refcount_inc+0x1c/0x7b\ncheck_memory_region+0x132/0x139\nrefcount_inc+0x1c/0x7b\nsco_sock_timeout+0xb2/0x1ba\nprocess_one_work+0x739/0xbd1\n? cancel_delayed_work+0x13f/0x13f\n? __raw_spin_lock_init+0xf0/0xf0\n? to_kthread+0x59/0x85\nworker_thread+0x593/0x70e\nkthread+0x346/0x35a\n? drain_workqueue+0x31a/0x31a\n? kthread_bind+0x4b/0x4b\nret_from_fork+0x1f/0x30"
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path is sco_sock_connect(), reached only via a local connect() on an AF_BLUETOOTH/BTPROTO_SCO socket. Adjacent Bluetooth peers cannot trigger this race; incoming SCO setup uses sco_conn_ready(), not sco_sock_connect().\nAC:L - The attacker controls both sides of the race by issuing concurrent connect() calls on the same socket (and can then close it). Per guidance, attacker-controlled races are AC:L; an HCI device being present is expected on the worst-case Bluetooth deployments (e.g., phones).\nPR:L - bt_sock_create()/sco_sock_create() impose no capability check for SCO sockets, so an unprivileged local user can create and connect them when an HCI device is up. This does not require real root or init-namespace admin rights.\nUI:N - Exploitation requires only attacker-controlled syscalls (socket/connect/close); no victim action is needed.\nS:U - This is a standard in-kernel use-after-free enabling local privilege escalation within the same host security authority, with no VM/IOMMU/sandbox boundary crossed.\nC:H - Use-after-free of the sock object in sco_sock_timeout (sock_hold and subsequent sk field access) can be leveraged for arbitrary kernel memory disclosure via reclaim/spray of the freed object.\nI:H - The same sock UAF provides a kernel write primitive (demonstrated as a KASAN use-after-free write on the refcount) and is exploitable for control-flow hijacking.\nA:H - The dangling timeout_work reliably touches a freed sock and causes a kernel oops/crash, as shown by the syzkaller KASAN report in sco_sock_timeout."
            }
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:55:20.366Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9de3dc09e56f8deacd2bdbf4cecb71e11a312405"
        },
        {
          "url": "https://git.kernel.org/stable/c/7d61dbd7311ab978d8ddac1749a758de4de00374"
        },
        {
          "url": "https://git.kernel.org/stable/c/390d82733a953c1fabf3de9c9618091a7a9c90a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/6f55fac0af3531cf60d11369454c41f5fc81ab3f"
        },
        {
          "url": "https://git.kernel.org/stable/c/36c644c63bfcaee2d3a426f45e89a9cd09799318"
        },
        {
          "url": "https://git.kernel.org/stable/c/65d347cb39e2e6bd0c2a745ad7c928998ebb0162"
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          "url": "https://git.kernel.org/stable/c/7aa1e7d15f8a5b65f67bacb100d8fc033b21efa2"
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      "title": "Bluetooth: fix dangling sco_conn and use-after-free in sco_sock_timeout",
      "x_generator": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49474",
    "datePublished": "2025-02-26T02:13:16.679Z",
    "dateReserved": "2025-02-26T02:08:31.579Z",
    "dateUpdated": "2026-08-05T08:55:20.366Z",
    "state": "PUBLISHED"
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\"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-27T18:15:56.136Z\"}}], \"cna\": {\"title\": \"Bluetooth: fix dangling sco_conn and use-after-free in sco_sock_timeout\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"22c66af08230a7030bdb88accffaec3424695631\", \"lessThan\": \"9de3dc09e56f8deacd2bdbf4cecb71e11a312405\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0115a66ebb44bd9127ccb58cf43ed23c795eb1f0\", \"lessThan\": \"7d61dbd7311ab978d8ddac1749a758de4de00374\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bc4b08383046f3282b6fa58cfcef05bd13e52b93\", \"lessThan\": \"390d82733a953c1fabf3de9c9618091a7a9c90a6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5ccb04c6e1fb7b97fa2e1785b67c3a1cb3527ef7\", \"lessThan\": \"6f55fac0af3531cf60d11369454c41f5fc81ab3f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"059c2c09f4b7f97711d0d8eaa0b9877f5e7d0a75\", \"lessThan\": \"36c644c63bfcaee2d3a426f45e89a9cd09799318\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e1dee2c1de2b4dd00eb44004a4bda6326ed07b59\", \"lessThan\": \"65d347cb39e2e6bd0c2a745ad7c928998ebb0162\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e1dee2c1de2b4dd00eb44004a4bda6326ed07b59\", \"lessThan\": \"537f619dea4e3fa8ed1f8f938abffe3615794bcc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e1dee2c1de2b4dd00eb44004a4bda6326ed07b59\", \"lessThan\": \"99df16007f4bbf9abfc3478cb17d10f0d7f8906e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e1dee2c1de2b4dd00eb44004a4bda6326ed07b59\", \"lessThan\": \"7aa1e7d15f8a5b65f67bacb100d8fc033b21efa2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"98ae477ed1540d3acbbf44d88ee237ad64275158\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f0c389e23e2475e5837716a629c81b7a9d90cc94\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0b9da4bde0d59c61b3675bdd80a05a726beb875a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4.9.283\", \"lessThan\": \"4.9.318\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.14.247\", \"lessThan\": \"4.14.283\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.19.207\", \"lessThan\": \"4.19.247\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.4.146\", \"lessThan\": \"5.4.198\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.10.65\", \"lessThan\": \"5.10.121\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.4.284\", \"lessThan\": \"4.5\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.13.17\", \"lessThan\": \"5.14\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.14.4\", \"lessThan\": \"5.15\", \"versionType\": \"semver\"}], \"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\": \"5.15\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.15\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.9.318\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.283\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.247\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.121\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.46\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.17.14\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.17.*\"}, {\"status\": \"unaffected\", \"version\": \"5.18.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.18.*\"}, {\"status\": \"unaffected\", \"version\": \"5.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/bluetooth/sco.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/9de3dc09e56f8deacd2bdbf4cecb71e11a312405\"}, {\"url\": \"https://git.kernel.org/stable/c/7d61dbd7311ab978d8ddac1749a758de4de00374\"}, {\"url\": \"https://git.kernel.org/stable/c/390d82733a953c1fabf3de9c9618091a7a9c90a6\"}, {\"url\": \"https://git.kernel.org/stable/c/6f55fac0af3531cf60d11369454c41f5fc81ab3f\"}, {\"url\": \"https://git.kernel.org/stable/c/36c644c63bfcaee2d3a426f45e89a9cd09799318\"}, {\"url\": \"https://git.kernel.org/stable/c/65d347cb39e2e6bd0c2a745ad7c928998ebb0162\"}, {\"url\": \"https://git.kernel.org/stable/c/537f619dea4e3fa8ed1f8f938abffe3615794bcc\"}, {\"url\": \"https://git.kernel.org/stable/c/99df16007f4bbf9abfc3478cb17d10f0d7f8906e\"}, {\"url\": \"https://git.kernel.org/stable/c/7aa1e7d15f8a5b65f67bacb100d8fc033b21efa2\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: fix dangling sco_conn and use-after-free in sco_sock_timeout\\n\\nConnecting the same socket twice consecutively in sco_sock_connect()\\ncould lead to a race condition where two sco_conn objects are created\\nbut only one is associated with the socket. If the socket is closed\\nbefore the SCO connection is established, the timer associated with the\\ndangling sco_conn object won\u0027t be canceled. As the sock object is being\\nfreed, the use-after-free problem happens when the timer callback\\nfunction sco_sock_timeout() accesses the socket. Here\u0027s the call trace:\\n\\ndump_stack+0x107/0x163\\n? refcount_inc+0x1c/\\nprint_address_description.constprop.0+0x1c/0x47e\\n? refcount_inc+0x1c/0x7b\\nkasan_report+0x13a/0x173\\n? refcount_inc+0x1c/0x7b\\ncheck_memory_region+0x132/0x139\\nrefcount_inc+0x1c/0x7b\\nsco_sock_timeout+0xb2/0x1ba\\nprocess_one_work+0x739/0xbd1\\n? cancel_delayed_work+0x13f/0x13f\\n? __raw_spin_lock_init+0xf0/0xf0\\n? to_kthread+0x59/0x85\\nworker_thread+0x593/0x70e\\nkthread+0x346/0x35a\\n? drain_workqueue+0x31a/0x31a\\n? kthread_bind+0x4b/0x4b\\nret_from_fork+0x1f/0x30\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.318\", \"versionStartIncluding\": \"4.9.283\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.283\", \"versionStartIncluding\": \"4.14.247\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.247\", \"versionStartIncluding\": \"4.19.207\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.198\", \"versionStartIncluding\": \"5.4.146\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.121\", \"versionStartIncluding\": \"5.10.65\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.46\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17.14\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.18.3\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.4.284\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.13.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.14.4\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-23T15:22:21.227Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49474\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-23T15:22:21.227Z\", \"dateReserved\": \"2025-02-26T02:08:31.579Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-26T02:13:16.679Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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