{"id":"CVE-2026-99038","summary":"memstick: rtsx_usb_ms: complete requests after eject instead of dropping them","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmemstick: rtsx_usb_ms: complete requests after eject instead of dropping them\n\nmemstick_check() can pass its host-\u003eremoving check just before\nrtsx_usb_ms_drv_remove() sets eject/removing. Its next request is then\nsilently dropped: rtsx_usb_ms_request() skips schedule_work() once eject\nis set, and drv_remove's cancel_work_sync() can also cancel a queued\nhandle_req before it picks the request up. Nobody completes\ncard-\u003emrq_complete.\n\nOnce memstick core waits for requests without a timeout (\"memstick: core:\nwait for request completion before freeing card\"), this hangs removal:\nmemstick_check() never returns and memstick_remove_host() blocks in\nflush_workqueue():\n\n  INFO: task kworker/u10:3:65 blocked for more than 20 seconds.\n  Workqueue: kmemstick memstick_check\n   __wait_for_common\n   memstick_check\n\n  INFO: task kworker/1:1:33 blocked for more than 20 seconds.\n  Workqueue: usb_hub_wq hub_event\n   __flush_workqueue\n   memstick_remove_host\n   rtsx_usb_ms_drv_remove\n\nNever drop a request. rtsx_usb_ms_request() always schedules handle_req,\nand handle_req fails requests with -ENOMEDIUM once eject is set, without\ntouching the device. drv_remove flushes handle_req instead of cancelling\nit, and cancels it only after memstick_remove_host(), when no new\nrequest can arrive, so it cannot run on a freed host.\n\nThe host_mutex drain in drv_remove is removed: handle_req always leaves\nhost-\u003ereq NULL when it finishes, so the drain never had anything to do,\nand it would now race with handle_req.","modified":"2026-11-06T17:27:20.352431827Z","published":"2026-10-23T12:21:56.333Z","related":["SUSE-SU-2026:24550-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99038.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5616da0f92339328fa1472876df51555e15ad340"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5b599e28aeb3684772aef64f46cc6f25f4c67128"},{"type":"WEB","url":"https://git.kernel.org/stable/c/602a00d75d2ab079c9ab7c0d7b56ae436e604148"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8e4eda6e1b00624820fea1d35508d7422330ee25"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c48245ef696e590e92cbfb622625642bec8dbbad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c96ca94425b076dc398d929366e378d1e22ec794"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d7e811c3a49cd5cff529c157df886719e09370ec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f2c181e1d58e911804e14543b2f1cc6b23a0d4d6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99038.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99038"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40"},{"fixed":"c48245ef696e590e92cbfb622625642bec8dbbad"},{"fixed":"602a00d75d2ab079c9ab7c0d7b56ae436e604148"},{"fixed":"8e4eda6e1b00624820fea1d35508d7422330ee25"},{"fixed":"f2c181e1d58e911804e14543b2f1cc6b23a0d4d6"},{"fixed":"5b599e28aeb3684772aef64f46cc6f25f4c67128"},{"fixed":"d7e811c3a49cd5cff529c157df886719e09370ec"},{"fixed":"5616da0f92339328fa1472876df51555e15ad340"},{"fixed":"c96ca94425b076dc398d929366e378d1e22ec794"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-99038.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.16.0"},{"fixed":"5.10.273"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.224"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.191"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.160"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.113"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.57"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-99038.json"}}],"schema_version":"1.9.2"}