{"id":"CVE-2026-53358","summary":"Bluetooth: L2CAP: use chan timer to close channels in cleanup_listen()","details":"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.","modified":"2026-07-08T08:09:46.840660969Z","published":"2026-07-02T13:43:17.630Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53358.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3634cbdc2eb414b69ffa752ddbe5e0458518e321"},{"type":"WEB","url":"https://git.kernel.org/stable/c/50dfec218808b148ab4247b1858031b7a32015c5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7555fd885a0603f50e49a655850a1f2bd8a25398"},{"type":"WEB","url":"https://git.kernel.org/stable/c/859d3ace791ed878ae9ba5522c7844d960da8f88"},{"type":"WEB","url":"https://git.kernel.org/stable/c/89dec92041717b027216e110599e4f6d6c921b79"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8c8e620467a7b51562dbcefbd1f09f288d7d710d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e1c100e2d61bd8c718b7d91fe3e050780a9bf72d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53358.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53358"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3df91ea20e744344100b10ae69a17211fcf5b207"},{"fixed":"3634cbdc2eb414b69ffa752ddbe5e0458518e321"},{"fixed":"e1c100e2d61bd8c718b7d91fe3e050780a9bf72d"},{"fixed":"deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9"},{"fixed":"89dec92041717b027216e110599e4f6d6c921b79"},{"fixed":"50dfec218808b148ab4247b1858031b7a32015c5"},{"fixed":"859d3ace791ed878ae9ba5522c7844d960da8f88"},{"fixed":"7555fd885a0603f50e49a655850a1f2bd8a25398"},{"fixed":"8c8e620467a7b51562dbcefbd1f09f288d7d710d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53358.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"fixed":"5.10.259"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.210"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.176"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.143"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.93"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.35"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53358.json"}}],"schema_version":"1.7.5"}