{"id":"CVE-2026-97977","revision":"56409a70de214590ba6b74dafaa89cf7","records":[{"revision":"56409a70de214590ba6b74dafaa89cf7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-97977","aliases":[],"title":"Bluetooth: btusb: Fix UAF of btusb_data by rx_work","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btusb: Fix UAF of btusb_data by rx_work\n\nbtusb_close() and btusb_flush() cancel data->rx_work with the\nasynchronous cancel_delayed_work(), so if btusb_rx_work() is already\nrunning on another CPU it keeps running after the cancel returns.\n\nbtusb_disconnect() calls hci_unregister_dev(), which invokes\nbtusb_close(), and then frees the btusb_data. A still running\nbtusb_rx_work() then dereferences the freed data:\n\n\twhile ((skb = skb_dequeue(&data->acl_q)))\n\t\tdata->recv_acl(data->hdev, skb);\n\nUse cancel_delayed_work_sync() instead. In btusb_close() the cancel also\nhas to happen after btusb_stop_traffic(), otherwise an URB completion\nracing with the cancel can requeue the work right after it has been\nwaited for.","state":0,"publishedAt":"2026-09-25T10:23:15.198+00:00","modifiedAt":"2026-10-19T09:11:44.507+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                        \"drivers/bluetooth/btusb.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"800fe5ec302e1ebbf5e3f891f886deecd49c7132\",\n                            \"lessThan\": \"fc654a72a8d979db15e2773a481e931abaf5a9e8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"800fe5ec302e1ebbf5e3f891f886deecd49c7132\",\n                            \"lessThan\": \"5242050195a711e9cd6a9935f689ab6656b94a91\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"800fe5ec302e1ebbf5e3f891f886deecd49c7132\",\n                            \"lessThan\": \"472d005622525b7be155cac99dde2252b0163bd1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"800fe5ec302e1ebbf5e3f891f886deecd49c7132\",\n                            \"lessThan\": \"93b59937bda3fffc6386c79f5544a39bc680c8e8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"800fe5ec302e1ebbf5e3f891f886deecd49c7132\",\n                            \"lessThan\": \"fa391adb9c755515a89993634745e9079e5ef37c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"800fe5ec302e1ebbf5e3f891f886deecd49c7132\",\n                            \"lessThan\": \"1c12c3117639e78940959d956519c758c57d0849\",\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                        \"drivers/bluetooth/btusb.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.17\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.17\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\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/fc654a72a8d979db15e2773a481e931abaf5a9e8","https://git.kernel.org/stable/c/5242050195a711e9cd6a9935f689ab6656b94a91","https://git.kernel.org/stable/c/472d005622525b7be155cac99dde2252b0163bd1","https://git.kernel.org/stable/c/93b59937bda3fffc6386c79f5544a39bc680c8e8","https://git.kernel.org/stable/c/fa391adb9c755515a89993634745e9079e5ef37c","https://git.kernel.org/stable/c/1c12c3117639e78940959d956519c758c57d0849"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97977","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-97977","identifiers":["CVE-2026-97977"]},"retained":false,"historicalAffected":[]}],"coverage":[]}