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CVE-2026-99038

memstick: rtsx_usb_ms: complete requests after eject instead of dropping them

Products / packages Linux

Published

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Severity and exploitation

Not in CISA KEVNo CVSS score

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 21:55:35 UTC

Severity

unknown

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

The Linux kernel's memstick driver has a vulnerability where requests are dropped after eject, causing removal to hang. Affected versions are prior to multiple specified git commits and semver versions. The weakness may cause task blocking.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Linux · Linux

Linux

8 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40 → before c48245ef696e590e92cbfb622625642bec8dbbad

git versions

99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40 → before 602a00d75d2ab079c9ab7c0d7b56ae436e604148

git versions

99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40 → before 8e4eda6e1b00624820fea1d35508d7422330ee25

git versions

99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40 → before f2c181e1d58e911804e14543b2f1cc6b23a0d4d6

git versions

99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40 → before 5b599e28aeb3684772aef64f46cc6f25f4c67128

git versions

99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40 → before d7e811c3a49cd5cff529c157df886719e09370ec

git versions

99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40 → before 5616da0f92339328fa1472876df51555e15ad340

git versions

99451dceeb5fdd789f0a2eeb3ee029e80d2ccc40 → before c96ca94425b076dc398d929366e378d1e22ec794

git versions

unaffected

unknown

Other versions: unaffected

Linux · Linux

Linux

10 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

3.16

unaffected

0 → before 3.16

semver versions

5.10.273 → through 5.10.*

semver versions

5.15.224 → through 5.15.*

semver versions

6.1.191 → through 6.1.*

semver versions

6.6.160 → through 6.6.*

semver versions

6.12.113 → through 6.12.*

semver versions

6.18.57 → through 6.18.*

semver versions

7.2.11 → through 7.2.*

semver versions

7.3 → through *

original_commit_for_fix versions

unknown

Other versions: affected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher 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.

References

8 sources
git.kernel.org/stable/c/c48245ef696e590e92cbfb622625642bec8dbbad
Source referenceLinux
git.kernel.org/stable/c/602a00d75d2ab079c9ab7c0d7b56ae436e604148
Source referenceLinux
git.kernel.org/stable/c/8e4eda6e1b00624820fea1d35508d7422330ee25
Source referenceLinux
git.kernel.org/stable/c/f2c181e1d58e911804e14543b2f1cc6b23a0d4d6
Source referenceLinux
git.kernel.org/stable/c/5b599e28aeb3684772aef64f46cc6f25f4c67128
Source referenceLinux
git.kernel.org/stable/c/d7e811c3a49cd5cff529c157df886719e09370ec
Source referenceLinux
View 2 more references
git.kernel.org/stable/c/5616da0f92339328fa1472876df51555e15ad340
Source referenceLinux
git.kernel.org/stable/c/c96ca94425b076dc398d929366e378d1e22ec794
Source referenceLinux

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification · not supplied
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-99038

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

Linux · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.16

Before: 5.10.273

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.16

Before: 5.15.224

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.16

Before: 6.1.191

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.16

Before: 6.6.160

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.16

Before: 6.12.113

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.16

Before: 6.18.57

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.16

Before: 7.2.11

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.16

Before: 7.3

Applicability preview
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    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.16",
            "versionEndExcluding": "5.10.273"
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          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            "vulnerable": true,
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            "vulnerable": true,
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Contributing organizations · 1
Linux

Assigning organization

2026-10-30

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.