{"id":"CVE-2026-90254","revision":"211b3d6b7ac64037b46b5452c2f45146","records":[{"revision":"211b3d6b7ac64037b46b5452c2f45146","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90254","aliases":[],"title":"Bluetooth: hci_sync: free the advertising instance on the failure and cancel paths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: free the advertising instance on the failure and cancel paths\n\nadv_timeout_expire() hands a kmalloc()ed instance byte to\nhci_cmd_sync_queue() with a NULL destroy callback, and only\nadv_timeout_expire_sync() frees it. That leaks on two paths:\n\n - the return value is not checked, and hci_cmd_sync_queue() does not\n   take ownership when it fails (-ENETDOWN, -ENODEV, -ENOMEM);\n\n - a cancelled entry is not released, as _hci_cmd_sync_cancel_entry()\n   does not free entry->data when there is no destroy callback.\n   hci_cmd_sync_clear() cancels every pending entry when the controller\n   is unregistered.\n\nFree the buffer from a destroy callback, and in the caller when the entry\ncould not be queued at all.","state":0,"publishedAt":"2026-09-17T16:07:54.123+00:00","modifiedAt":"2026-10-19T09:00:30.99+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/hci_sync.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c249ea9b4309cf3250c5bbb42a05d38d0ed9071c\",\n                            \"lessThan\": \"c2019224a766245b7db39d87fdfe84c3fdc879d9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c249ea9b4309cf3250c5bbb42a05d38d0ed9071c\",\n                            \"lessThan\": \"193182c6467f508a8a61d5db506d796ffed6eee6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c249ea9b4309cf3250c5bbb42a05d38d0ed9071c\",\n                            \"lessThan\": \"2e3d827cd56865c14f6ca118bbccd7801091fb21\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c249ea9b4309cf3250c5bbb42a05d38d0ed9071c\",\n                            \"lessThan\": \"9c3b6c1413bd0b4993642d987616331f84d9b7f5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c249ea9b4309cf3250c5bbb42a05d38d0ed9071c\",\n                            \"lessThan\": \"bb5ca1cc7744c41c59002bd6523714a685ae6595\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c249ea9b4309cf3250c5bbb42a05d38d0ed9071c\",\n                            \"lessThan\": \"120d8dc042e3d45073bb6e50ee7b058a0b182627\",\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/hci_sync.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/c2019224a766245b7db39d87fdfe84c3fdc879d9","https://git.kernel.org/stable/c/193182c6467f508a8a61d5db506d796ffed6eee6","https://git.kernel.org/stable/c/2e3d827cd56865c14f6ca118bbccd7801091fb21","https://git.kernel.org/stable/c/9c3b6c1413bd0b4993642d987616331f84d9b7f5","https://git.kernel.org/stable/c/bb5ca1cc7744c41c59002bd6523714a685ae6595","https://git.kernel.org/stable/c/120d8dc042e3d45073bb6e50ee7b058a0b182627"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90254","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90254","identifiers":["CVE-2026-90254"]},"retained":false,"historicalAffected":[]}],"coverage":[]}