{"id":"CVE-2026-98766","summary":"usb: gadget: aspeed-vhub: cancel wake work on device removal","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: aspeed-vhub: cancel wake work on device removal\n\nwake_work is armed from the gadget .wakeup callback to resume suspended\ndownstream ports, and it is never cancelled in ast_vhub_remove(), so a\nwork item queued before or during removal can run after devm has freed\nvhub and its ports, a use-after-free.\n\nCancelling the work alone is not sufficient: usb_gadget_wakeup() takes\nno lock and the unbind path never clears wakeup_en, so a remote-wakeup\nrequest in flight on another CPU can re-arm the work after the cancel\nand before vhub is freed.\n\nast_vhub_del_dev() already clears d-\u003eregistered under vhub-\u003elock before\nunregistering the gadget. Refuse the wakeup in ast_vhub_udc_wakeup()\nonce d-\u003eregistered is clear: the check and the schedule_work() are then\natomic against the unbind, so a wakeup that passed before the flag was\ncleared is drained by the cancel_work_sync() after the del_dev loop,\nand one that arrives later returns without arming. Also move INIT_WORK()\nto the top of ast_vhub_probe(), since the probe error path reuses\nast_vhub_remove() and would otherwise cancel a never-initialized work\nitem.\n\nThis issue was found by an in-house static analysis tool.","modified":"2026-10-19T02:47:05.725330897Z","published":"2026-10-18T15:47:59.061Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98766.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/20388c8d1d74c203fec8194c45cd31afdfab934e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98766.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98766"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c"},{"fixed":"f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41"},{"fixed":"474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d"},{"fixed":"c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1"},{"fixed":"20388c8d1d74c203fec8194c45cd31afdfab934e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98766.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.18.0"},{"fixed":"6.12.113"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.56"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98766.json"}}],"schema_version":"1.9.0"}