{"id":"CVE-2026-16148","summary":"Kernel panic in the it82xx2 USB device controller driver via re-initialization of a busy delayable work item","details":"The ITE it82xx2 USB device-controller driver initialized its bus-suspend detection work with k_work_init_delayable(&priv-\u003esuspended_work, suspended_handler) inside it82xx2_enable() (the driver's .enable op) in drivers/usb/udc/udc_it82xx2.c. This work item is scheduled essentially continuously while the USB bus is active: the interrupt handler reschedules it on every SOF frame and suspended_handler() reschedules itself, so its timeout node is normally linked in the kernel timeout list / a workqueue pending queue.\n\nk_work_init_delayable() (kernel/work.c) unconditionally overwrites the entire k_work_delayable structure, including its timeout and queue linkage, with no busy check. Because it82xx2_disable() does not cancel the work, a normal disable-then-enable cycle re-runs api-\u003eenable() (udc_enable() only rejects a redundant enable, not a re-enable after disable) and re-initializes the still-pending work in place, corrupting the kernel timeout/workqueue linked lists and causing a kernel panic.\n\nAn external USB host — for example a host performing USB DFU detach (dfu-util --detach) or forcing repeated attach/reset/re-enumeration — drives the udc_disable()/udc_enable() transitions and controls suspend/resume timing, so it can arrange for the suspend work to be pending across a re-enable. This yields an unauthenticated denial of service (kernel panic) reachable across the USB boundary from a removable, physically-connected host, with no confidentiality or integrity impact demonstrated.\n\nThe fix moves the k_work_init_delayable() call into the one-time preinit function so the work is initialized exactly once, eliminating the re-initialization of an in-use item.","aliases":["GHSA-fvp9-j2pq-477x"],"modified":"2026-09-16T08:29:33.092017Z","published":"2026-09-14T19:33:47.396Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16148.json","cna_assigner":"zephyr","cwe_ids":["CWE-666"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16148.json"},{"type":"ADVISORY","url":"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fvp9-j2pq-477x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16148"},{"type":"FIX","url":"https://github.com/zephyrproject-rtos/zephyr/commit/350fd5dfd49e6aca99724fb3f0d4998fe28b4b6c"},{"type":"PACKAGE","url":"https://github.com/zephyrproject-rtos/zephyr"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zephyrproject-rtos/zephyr","events":[{"introduced":"36940db938a8f4a1e919496793ed439850a221c2"},{"fixed":"350fd5dfd49e6aca99724fb3f0d4998fe28b4b6c"}],"database_specific":{"extracted_events":[{"introduced":"3.7.0"},{"fixed":"4.4.2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v4.4.0","v4.4.0-rc3","v4.4.0-rc2","v4.4.0-rc1","v4.3.0","v4.3.0-rc3","v4.3.0-rc2","v4.3.0-rc1","v4.2.0","v4.2.0-rc3","v4.2.0-rc2","v4.2.0-rc1","v4.1.0","v4.1.0-rc3","v4.1.0-rc2","v4.1.0-rc1","v4.0.0","v4.0.0-rc3","v4.0.0-rc2","v4.0.0-rc1","v3.7.0"],"database_specific":{"vanir_signatures":[{"id":"CVE-2026-16148-02302178","signature_type":"Function","signature_version":"v1","source":"https://github.com/zephyrproject-rtos/zephyr/commit/350fd5dfd49e6aca99724fb3f0d4998fe28b4b6c","target":{"file":"drivers/usb/udc/udc_it82xx2.c","function":"it82xx2_usb_driver_preinit"},"deprecated":false,"digest":{"length":1861,"function_hash":"221150625420740132896610759453073453409"}},{"target":{"file":"drivers/usb/udc/udc_it82xx2.c"},"deprecated":false,"digest":{"line_hashes":["336320293347757465951711119569174275306","294176960162537548848804946660367886429","176884664821113168725733313667093488234","258954051390995391521960179519719801253","149699298505737454150520071671018319363","217871377414437552124220390156733391650","8218237362883327511410411849146969821"],"threshold":0.9},"id":"CVE-2026-16148-b9433931","signature_type":"Line","signature_version":"v1","source":"https://github.com/zephyrproject-rtos/zephyr/commit/350fd5dfd49e6aca99724fb3f0d4998fe28b4b6c"},{"signature_type":"Function","signature_version":"v1","source":"https://github.com/zephyrproject-rtos/zephyr/commit/350fd5dfd49e6aca99724fb3f0d4998fe28b4b6c","target":{"file":"drivers/usb/udc/udc_it82xx2.c","function":"it82xx2_enable"},"deprecated":false,"digest":{"function_hash":"68994605172123279235980028945010805941","length":688},"id":"CVE-2026-16148-d4a35621"}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-16148.json","vanir_signatures_modified":"2026-09-16T08:29:33Z"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}