CVE-2026-53358 (GCVE-0-2026-53358)
Vulnerability from cvelistv5
Published
2026-07-02 13:43
Modified
2026-10-19 20:07
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: use chan timer to close channels in cleanup_listen() l2cap_chan_close() removes the channel from conn->chan_l, which must be done under conn->lock. cleanup_listen() runs under the parent sk_lock, so acquiring conn->lock would invert the established conn->lock -> chan->lock -> sk_lock order. Instead of calling l2cap_chan_close() directly, schedule l2cap_chan_timeout with delay 0 to close the channel asynchronously. The timeout handler already acquires conn->lock and chan->lock in the correct order. The timer is only armed when chan->conn is still set: if it is already NULL, l2cap_conn_del() has already processed this channel (l2cap_chan_del + l2cap_sock_teardown_cb + l2cap_sock_close_cb), so there is nothing left to do. If l2cap_conn_del() races in after the timer is armed, __clear_chan_timer() inside l2cap_chan_del() cancels it; if the timer has already fired, the handler returns harmlessly because chan->conn was cleared.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3df91ea20e744344100b10ae69a17211fcf5b207
Version: 3df91ea20e744344100b10ae69a17211fcf5b207
Version: 3df91ea20e744344100b10ae69a17211fcf5b207
Version: 3df91ea20e744344100b10ae69a17211fcf5b207
Version: 3df91ea20e744344100b10ae69a17211fcf5b207
Version: 3df91ea20e744344100b10ae69a17211fcf5b207
Version: 3df91ea20e744344100b10ae69a17211fcf5b207
Version: 3df91ea20e744344100b10ae69a17211fcf5b207
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    "datePublished": "2026-07-02T13:43:17.630Z",
    "dateReserved": "2026-06-09T07:44:35.400Z",
    "dateUpdated": "2026-10-19T20:07:44.244Z",
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A repeatable kernel crash is high availability impact.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\", \"lessThan\": \"3634cbdc2eb414b69ffa752ddbe5e0458518e321\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\", \"lessThan\": \"e1c100e2d61bd8c718b7d91fe3e050780a9bf72d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\", \"lessThan\": \"deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\", \"lessThan\": \"89dec92041717b027216e110599e4f6d6c921b79\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\", \"lessThan\": \"50dfec218808b148ab4247b1858031b7a32015c5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\", \"lessThan\": \"859d3ace791ed878ae9ba5522c7844d960da8f88\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\", \"lessThan\": \"7555fd885a0603f50e49a655850a1f2bd8a25398\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\", \"lessThan\": \"8c8e620467a7b51562dbcefbd1f09f288d7d710d\", \"versionType\": \"git\"}], \"programFiles\": [\"net/bluetooth/l2cap_sock.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.259\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.210\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.176\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.143\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.93\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.35\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"7.0.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.0.*\"}, {\"status\": \"unaffected\", \"version\": \"7.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/bluetooth/l2cap_sock.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/3634cbdc2eb414b69ffa752ddbe5e0458518e321\"}, {\"url\": \"https://git.kernel.org/stable/c/e1c100e2d61bd8c718b7d91fe3e050780a9bf72d\"}, {\"url\": \"https://git.kernel.org/stable/c/deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9\"}, {\"url\": \"https://git.kernel.org/stable/c/89dec92041717b027216e110599e4f6d6c921b79\"}, {\"url\": \"https://git.kernel.org/stable/c/50dfec218808b148ab4247b1858031b7a32015c5\"}, {\"url\": \"https://git.kernel.org/stable/c/859d3ace791ed878ae9ba5522c7844d960da8f88\"}, {\"url\": \"https://git.kernel.org/stable/c/7555fd885a0603f50e49a655850a1f2bd8a25398\"}, {\"url\": \"https://git.kernel.org/stable/c/8c8e620467a7b51562dbcefbd1f09f288d7d710d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: L2CAP: use chan timer to close channels in cleanup_listen()\\n\\nl2cap_chan_close() removes the channel from conn-\u003echan_l, which\\nmust be done under conn-\u003elock.  cleanup_listen() runs under the\\nparent sk_lock, so acquiring conn-\u003elock would invert the\\nestablished conn-\u003elock -\u003e chan-\u003elock -\u003e sk_lock order.\\n\\nInstead of calling l2cap_chan_close() directly, schedule\\nl2cap_chan_timeout with delay 0 to close the channel\\nasynchronously.  The timeout handler already acquires conn-\u003elock\\nand chan-\u003elock in the correct order.\\n\\nThe timer is only armed when chan-\u003econn is still set: if it is\\nalready NULL, l2cap_conn_del() has already processed this channel\\n(l2cap_chan_del + l2cap_sock_teardown_cb + l2cap_sock_close_cb),\\nso there is nothing left to do.  If l2cap_conn_del() races in\\nafter the timer is armed, __clear_chan_timer() inside\\nl2cap_chan_del() cancels it; if the timer has already fired, the\\nhandler returns harmlessly because chan-\u003econn was cleared.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.259\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.210\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.176\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.143\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.93\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.35\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.0.12\", \"versionStartIncluding\": \"3.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.1\", \"versionStartIncluding\": \"3.4\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:35:07.724Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-53358\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-19T20:07:44.244Z\", \"dateReserved\": \"2026-06-09T07:44:35.400Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-07-02T13:43:17.630Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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