{"id":"CVE-2026-53358","revision":null,"records":[{"revision":"00d77df91856439daeb6bc04f7cf3b8a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53358","aliases":[],"title":"Bluetooth: L2CAP: use chan timer to close channels in cleanup_listen()","description":"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->chan_l, which\nmust be done under conn->lock. cleanup_listen() runs under the\nparent sk_lock, so acquiring conn->lock would invert the\nestablished conn->lock -> chan->lock -> 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->lock\nand chan->lock in the correct order.\n\nThe timer is only armed when chan->conn 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->conn was cleared.","state":0,"publishedAt":"2026-07-02T13:43:17.63+00:00","modifiedAt":"2026-10-19T20:07:44.244+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/bluetooth/l2cap_sock.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\",\n \"lessThan\": \"3634cbdc2eb414b69ffa752ddbe5e0458518e321\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\",\n \"lessThan\": \"e1c100e2d61bd8c718b7d91fe3e050780a9bf72d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\",\n \"lessThan\": \"deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\",\n \"lessThan\": \"89dec92041717b027216e110599e4f6d6c921b79\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\",\n \"lessThan\": \"50dfec218808b148ab4247b1858031b7a32015c5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\",\n \"lessThan\": \"859d3ace791ed878ae9ba5522c7844d960da8f88\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\",\n \"lessThan\": \"7555fd885a0603f50e49a655850a1f2bd8a25398\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"3df91ea20e744344100b10ae69a17211fcf5b207\",\n \"lessThan\": \"8c8e620467a7b51562dbcefbd1f09f288d7d710d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/bluetooth/l2cap_sock.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.4\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.4\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.259\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.210\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.176\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.143\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.93\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.35\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.12\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/3634cbdc2eb414b69ffa752ddbe5e0458518e321","https://git.kernel.org/stable/c/e1c100e2d61bd8c718b7d91fe3e050780a9bf72d","https://git.kernel.org/stable/c/deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9","https://git.kernel.org/stable/c/89dec92041717b027216e110599e4f6d6c921b79","https://git.kernel.org/stable/c/50dfec218808b148ab4247b1858031b7a32015c5","https://git.kernel.org/stable/c/859d3ace791ed878ae9ba5522c7844d960da8f88","https://git.kernel.org/stable/c/7555fd885a0603f50e49a655850a1f2bd8a25398","https://git.kernel.org/stable/c/8c8e620467a7b51562dbcefbd1f09f288d7d710d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53358","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53358","identifiers":["CVE-2026-53358"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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