FKIE_CVE-2026-99038

Vulnerability from fkie_nvd - Published: 2026-10-23 13:17 - Updated: 2026-10-23 13:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: memstick: rtsx_usb_ms: complete requests after eject instead of dropping them memstick_check() can pass its host->removing check just before rtsx_usb_ms_drv_remove() sets eject/removing. Its next request is then silently dropped: rtsx_usb_ms_request() skips schedule_work() once eject is set, and drv_remove's cancel_work_sync() can also cancel a queued handle_req before it picks the request up. Nobody completes card->mrq_complete. Once memstick core waits for requests without a timeout ("memstick: core: wait for request completion before freeing card"), this hangs removal: memstick_check() never returns and memstick_remove_host() blocks in flush_workqueue(): INFO: task kworker/u10:3:65 blocked for more than 20 seconds. Workqueue: kmemstick memstick_check __wait_for_common memstick_check INFO: task kworker/1:1:33 blocked for more than 20 seconds. Workqueue: usb_hub_wq hub_event __flush_workqueue memstick_remove_host rtsx_usb_ms_drv_remove Never drop a request. rtsx_usb_ms_request() always schedules handle_req, and handle_req fails requests with -ENOMEDIUM once eject is set, without touching the device. drv_remove flushes handle_req instead of cancelling it, and cancels it only after memstick_remove_host(), when no new request can arrive, so it cannot run on a freed host. The host_mutex drain in drv_remove is removed: handle_req always leaves host->req NULL when it finishes, so the drain never had anything to do, and it would now race with handle_req.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5616da0f92339328fa1472876df51555e15ad340
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5b599e28aeb3684772aef64f46cc6f25f4c67128
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c96ca94425b076dc398d929366e378d1e22ec794
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d7e811c3a49cd5cff529c157df886719e09370ec
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f2c181e1d58e911804e14543b2f1cc6b23a0d4d6
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/memstick/host/rtsx_usb_ms.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f2c181e1d58e911804e14543b2f1cc6b23a0d4d6",
              "status": "affected",
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "versionType": "git"
            },
            {
              "lessThan": "5b599e28aeb3684772aef64f46cc6f25f4c67128",
              "status": "affected",
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "versionType": "git"
            },
            {
              "lessThan": "d7e811c3a49cd5cff529c157df886719e09370ec",
              "status": "affected",
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "versionType": "git"
            },
            {
              "lessThan": "5616da0f92339328fa1472876df51555e15ad340",
              "status": "affected",
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "versionType": "git"
            },
            {
              "lessThan": "c96ca94425b076dc398d929366e378d1e22ec794",
              "status": "affected",
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/memstick/host/rtsx_usb_ms.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.16"
            },
            {
              "lessThan": "3.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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-\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\u0027s 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."
    }
  ],
  "id": "CVE-2026-99038",
  "lastModified": "2026-10-23T13:17:27.067",
  "metrics": {},
  "published": "2026-10-23T13:17:27.067",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5616da0f92339328fa1472876df51555e15ad340"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5b599e28aeb3684772aef64f46cc6f25f4c67128"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c96ca94425b076dc398d929366e378d1e22ec794"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d7e811c3a49cd5cff529c157df886719e09370ec"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f2c181e1d58e911804e14543b2f1cc6b23a0d4d6"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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