CVE-2026-99038

Full vulnerability record from the local CVENow database.

Description

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.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-10-23 13:17:27.067000

Last modified

2026-10-30 13:21:40.917000

View original CVE JSON

{
  "id": "CVE-2026-99038",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-23T13:17:27.067",
  "lastModified": "2026-10-30T13:21:40.917",
  "vulnStatus": "Received",
  "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->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": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/memstick/host/rtsx_usb_ms.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "lessThan": "c48245ef696e590e92cbfb622625642bec8dbbad",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "lessThan": "602a00d75d2ab079c9ab7c0d7b56ae436e604148",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "lessThan": "8e4eda6e1b00624820fea1d35508d7422330ee25",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "lessThan": "f2c181e1d58e911804e14543b2f1cc6b23a0d4d6",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "lessThan": "5b599e28aeb3684772aef64f46cc6f25f4c67128",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "lessThan": "d7e811c3a49cd5cff529c157df886719e09370ec",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "lessThan": "5616da0f92339328fa1472876df51555e15ad340",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40",
              "lessThan": "c96ca94425b076dc398d929366e378d1e22ec794",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/memstick/host/rtsx_usb_ms.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "3.16",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "3.16",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.273",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.224",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.113",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.57",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.11",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "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"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c48245ef696e590e92cbfb622625642bec8dbbad",
      "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",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}