{"id":"CVE-2026-99038","state":"PUBLISHED","title":"memstick: rtsx_usb_ms: complete requests after eject instead of dropping them","description":"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->removing 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->mrq_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->req NULL when it finishes, so the drain never had anything to do,\nand it would now race with handle_req.","publishedAt":"2026-10-23T12:21:56.333Z","updatedAt":"2026-10-30T12:41:11.555Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"c48245ef696e590e92cbfb622625642bec8dbbad","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"602a00d75d2ab079c9ab7c0d7b56ae436e604148","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"8e4eda6e1b00624820fea1d35508d7422330ee25","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"f2c181e1d58e911804e14543b2f1cc6b23a0d4d6","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"5b599e28aeb3684772aef64f46cc6f25f4c67128","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"d7e811c3a49cd5cff529c157df886719e09370ec","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"5616da0f92339328fa1472876df51555e15ad340","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"c96ca94425b076dc398d929366e378d1e22ec794","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/memstick/host/rtsx_usb_ms.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.16","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/memstick/host/rtsx_usb_ms.c"]}],"references":["https://git.kernel.org/stable/c/c48245ef696e590e92cbfb622625642bec8dbbad","https://git.kernel.org/stable/c/602a00d75d2ab079c9ab7c0d7b56ae436e604148","https://git.kernel.org/stable/c/8e4eda6e1b00624820fea1d35508d7422330ee25","https://git.kernel.org/stable/c/f2c181e1d58e911804e14543b2f1cc6b23a0d4d6","https://git.kernel.org/stable/c/5b599e28aeb3684772aef64f46cc6f25f4c67128","https://git.kernel.org/stable/c/d7e811c3a49cd5cff529c157df886719e09370ec","https://git.kernel.org/stable/c/5616da0f92339328fa1472876df51555e15ad340","https://git.kernel.org/stable/c/c96ca94425b076dc398d929366e378d1e22ec794"],"weaknesses":[],"ingestedAt":"2026-10-30T13:00:06.648Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/99xxx/CVE-2026-99038.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99038","state":"PUBLISHED","datePublished":"2026-10-23T12:21:56.333Z","dateUpdated":"2026-10-30T12:41:11.555Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.387Z"},"containers":{"cna":{"title":"memstick: rtsx_usb_ms: complete requests after eject instead of dropping them","descriptions":[{"lang":"en","value":"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->removing 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->mrq_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->req NULL when it finishes, so the drain never had anything to do,\nand it would now race with handle_req."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"c48245ef696e590e92cbfb622625642bec8dbbad","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"602a00d75d2ab079c9ab7c0d7b56ae436e604148","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"8e4eda6e1b00624820fea1d35508d7422330ee25","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"f2c181e1d58e911804e14543b2f1cc6b23a0d4d6","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"5b599e28aeb3684772aef64f46cc6f25f4c67128","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"d7e811c3a49cd5cff529c157df886719e09370ec","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"5616da0f92339328fa1472876df51555e15ad340","versionType":"git"},{"version":"99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40","status":"affected","lessThan":"c96ca94425b076dc398d929366e378d1e22ec794","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/memstick/host/rtsx_usb_ms.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.16","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/memstick/host/rtsx_usb_ms.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c48245ef696e590e92cbfb622625642bec8dbbad"},{"url":"https://git.kernel.org/stable/c/602a00d75d2ab079c9ab7c0d7b56ae436e604148"},{"url":"https://git.kernel.org/stable/c/8e4eda6e1b00624820fea1d35508d7422330ee25"},{"url":"https://git.kernel.org/stable/c/f2c181e1d58e911804e14543b2f1cc6b23a0d4d6"},{"url":"https://git.kernel.org/stable/c/5b599e28aeb3684772aef64f46cc6f25f4c67128"},{"url":"https://git.kernel.org/stable/c/d7e811c3a49cd5cff529c157df886719e09370ec"},{"url":"https://git.kernel.org/stable/c/5616da0f92339328fa1472876df51555e15ad340"},{"url":"https://git.kernel.org/stable/c/c96ca94425b076dc398d929366e378d1e22ec794"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:41:11.555Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"7.2.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}