{"affected":[{"defaultStatus":"unaffected","ecosystem":"https://github.com/zephyrproject-rtos/zephyr","packageName":"zephyr","product":"zephyr","source":"CNA: zephyr","vendor":"zephyrproject","versions":[{"lessThan":"4.3.2","status":"affected","version":"3.7.0","versionType":"semver"},{"lessThan":"4.4.2","status":"affected","version":"4.4.0","versionType":"semver"}]}],"cveId":"CVE-2026-16148","cwes":["CWE-666"],"description":"The ITE it82xx2 USB device-controller driver initialized its bus-suspend detection work with k_work_init_delayable(&priv->suspended_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->enable() (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.","epss":{"date":"2026-11-03","percentile":0.13949,"score":0.0023},"exploits":[],"kev":null,"metrics":[{"score":4.6,"severity":"medium","source":"CNA: zephyr","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},{"score":4.6,"severity":"medium","source":"NVD: vulnerabilities@zephyrproject.org","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1793769524610,"publishedAt":1789414427396,"references":[{"source":"CNA: zephyr","tags":["patch"],"url":"https://github.com/zephyrproject-rtos/zephyr/commit/350fd5dfd49e6aca99724fb3f0d4998fe28b4b6c"},{"source":"CNA: zephyr","tags":[],"url":"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fvp9-j2pq-477x"},{"source":"vulnerabilities@zephyrproject.org","tags":[],"url":"https://github.com/zephyrproject-rtos/zephyr/commit/350fd5dfd49e6aca99724fb3f0d4998fe28b4b6c"},{"source":"vulnerabilities@zephyrproject.org","tags":[],"url":"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fvp9-j2pq-477x"}],"remediation":[{"kind":"fix","source":"CNA: zephyr","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/zephyrproject-rtos/zephyr/commit/350fd5dfd49e6aca99724fb3f0d4998fe28b4b6c"}],"revision":"aa5fc8e287373704101b31ad51fd33d497c47f768aedaf7fd0aebe90d9f01f94","sources":[{"modifiedAt":1793768413935,"name":"CNA: zephyr","retrievedAt":1793769054362,"url":"https://www.cve.org/CVERecord?id=CVE-2026-16148"},{"modifiedAt":1793769524610,"name":"NVD","retrievedAt":1793772965822,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16148"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793769081089,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-16148"}],"ssvc":{"assessedAt":1789416384030,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Kernel panic in the it82xx2 USB device controller driver via re-initialization of a busy delayable work item","updatedAt":1793772965822}