{"api_version":"1","generated_at":"2026-10-03T21:02:35+00:00","cve":"CVE-2026-97977","urls":{"html":"https://cve.report/CVE-2026-97977","api":"https://cve.report/api/cve/CVE-2026-97977.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-97977","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-97977"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-09-25 11:17:25","updated_at":"2026-10-03 11:18:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/fc654a72a8d979db15e2773a481e931abaf5a9e8","name":"https://git.kernel.org/stable/c/fc654a72a8d979db15e2773a481e931abaf5a9e8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1c12c3117639e78940959d956519c758c57d0849","name":"https://git.kernel.org/stable/c/1c12c3117639e78940959d956519c758c57d0849","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fa391adb9c755515a89993634745e9079e5ef37c","name":"https://git.kernel.org/stable/c/fa391adb9c755515a89993634745e9079e5ef37c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/93b59937bda3fffc6386c79f5544a39bc680c8e8","name":"https://git.kernel.org/stable/c/93b59937bda3fffc6386c79f5544a39bc680c8e8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5242050195a711e9cd6a9935f689ab6656b94a91","name":"https://git.kernel.org/stable/c/5242050195a711e9cd6a9935f689ab6656b94a91","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/472d005622525b7be155cac99dde2252b0163bd1","name":"https://git.kernel.org/stable/c/472d005622525b7be155cac99dde2252b0163bd1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97977","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97977","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 fc654a72a8d979db15e2773a481e931abaf5a9e8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 5242050195a711e9cd6a9935f689ab6656b94a91 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 472d005622525b7be155cac99dde2252b0163bd1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 93b59937bda3fffc6386c79f5544a39bc680c8e8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 fa391adb9c755515a89993634745e9079e5ef37c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 1c12c3117639e78940959d956519c758c57d0849 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.7 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"97977","cve":"CVE-2026-97977","epss":"0.001680000","percentile":"0.054030000","score_date":"2026-09-27","updated_at":"2026-09-28 00:02:24"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/bluetooth/btusb.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"fc654a72a8d979db15e2773a481e931abaf5a9e8","status":"affected","version":"800fe5ec302e1ebbf5e3f891f886deecd49c7132","versionType":"git"},{"lessThan":"5242050195a711e9cd6a9935f689ab6656b94a91","status":"affected","version":"800fe5ec302e1ebbf5e3f891f886deecd49c7132","versionType":"git"},{"lessThan":"472d005622525b7be155cac99dde2252b0163bd1","status":"affected","version":"800fe5ec302e1ebbf5e3f891f886deecd49c7132","versionType":"git"},{"lessThan":"93b59937bda3fffc6386c79f5544a39bc680c8e8","status":"affected","version":"800fe5ec302e1ebbf5e3f891f886deecd49c7132","versionType":"git"},{"lessThan":"fa391adb9c755515a89993634745e9079e5ef37c","status":"affected","version":"800fe5ec302e1ebbf5e3f891f886deecd49c7132","versionType":"git"},{"lessThan":"1c12c3117639e78940959d956519c758c57d0849","status":"affected","version":"800fe5ec302e1ebbf5e3f891f886deecd49c7132","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/bluetooth/btusb.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.17"},{"lessThan":"5.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.111","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.53","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"5.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc3","versionStartIncluding":"5.17","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-10-03T11:01:10.738Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/fc654a72a8d979db15e2773a481e931abaf5a9e8"},{"url":"https://git.kernel.org/stable/c/5242050195a711e9cd6a9935f689ab6656b94a91"},{"url":"https://git.kernel.org/stable/c/472d005622525b7be155cac99dde2252b0163bd1"},{"url":"https://git.kernel.org/stable/c/93b59937bda3fffc6386c79f5544a39bc680c8e8"},{"url":"https://git.kernel.org/stable/c/fa391adb9c755515a89993634745e9079e5ef37c"},{"url":"https://git.kernel.org/stable/c/1c12c3117639e78940959d956519c758c57d0849"}],"title":"Bluetooth: btusb: Fix UAF of btusb_data by rx_work","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-97977","datePublished":"2026-09-25T10:23:15.198Z","dateReserved":"2026-09-25T10:18:58.208Z","dateUpdated":"2026-10-03T11:01:10.738Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-25 11:17:25","lastModifiedDate":"2026-10-03 11:18:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"97977","Ordinal":"1","Title":"Bluetooth: btusb: Fix UAF of btusb_data by rx_work","CVE":"CVE-2026-97977","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"97977","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Bluetooth: btusb: Fix UAF of btusb_data by rx_work"}]}}}