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CVE-2026-98766

usb: gadget: aspeed-vhub: cancel wake work on device removal

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, 21:15:32 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

In the Linux kernel, the following vulnerability has been resolved:

Source excerpt · Linux

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

7ecca2a4080cb6b1fa174adc588fce9e9014c43c → before 89b3fef8809ec1a9acf5f753eb89b9508d7e4466

git versions

7ecca2a4080cb6b1fa174adc588fce9e9014c43c → before 3aed0c86afa7877d08722233a8b15e8c1ff8bcb8

git versions

7ecca2a4080cb6b1fa174adc588fce9e9014c43c → before 552f580a18787cfbd83d28d7d76d584c29f2c4c2

git versions

7ecca2a4080cb6b1fa174adc588fce9e9014c43c → before 0d39ac4f65f9357469518c70e42940e0d8b0e497

git versions

7ecca2a4080cb6b1fa174adc588fce9e9014c43c → before f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41

git versions

7ecca2a4080cb6b1fa174adc588fce9e9014c43c → before 474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d

git versions

7ecca2a4080cb6b1fa174adc588fce9e9014c43c → before c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1

git versions

7ecca2a4080cb6b1fa174adc588fce9e9014c43c → before 20388c8d1d74c203fec8194c45cd31afdfab934e

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

4.18

unaffected

0 → before 4.18

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

6.18.56 → through 6.18.*

semver versions

7.2.10 → 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:

usb: gadget: aspeed-vhub: cancel wake work on device removal

wake_work is armed from the gadget .wakeup callback to resume suspended downstream ports, and it is never cancelled in ast_vhub_remove(), so a work item queued before or during removal can run after devm has freed vhub and its ports, a use-after-free.

Cancelling the work alone is not sufficient: usb_gadget_wakeup() takes no lock and the unbind path never clears wakeup_en, so a remote-wakeup request in flight on another CPU can re-arm the work after the cancel and before vhub is freed.

ast_vhub_del_dev() already clears d->registered under vhub->lock before unregistering the gadget. Refuse the wakeup in ast_vhub_udc_wakeup() once d->registered is clear: the check and the schedule_work() are then atomic against the unbind, so a wakeup that passed before the flag was cleared is drained by the cancel_work_sync() after the del_dev loop, and one that arrives later returns without arming. Also move INIT_WORK() to the top of ast_vhub_probe(), since the probe error path reuses ast_vhub_remove() and would otherwise cancel a never-initialized work item.

This issue was found by an in-house static analysis tool.

References

8 sources
git.kernel.org/stable/c/89b3fef8809ec1a9acf5f753eb89b9508d7e4466
Source referenceLinux
git.kernel.org/stable/c/3aed0c86afa7877d08722233a8b15e8c1ff8bcb8
Source referenceLinux
git.kernel.org/stable/c/552f580a18787cfbd83d28d7d76d584c29f2c4c2
Source referenceLinux
git.kernel.org/stable/c/0d39ac4f65f9357469518c70e42940e0d8b0e497
Source referenceLinux
git.kernel.org/stable/c/f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41
Source referenceLinux
git.kernel.org/stable/c/474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d
Source referenceLinux
View 2 more references
git.kernel.org/stable/c/c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1
Source referenceLinux
git.kernel.org/stable/c/20388c8d1d74c203fec8194c45cd31afdfab934e
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-2026-98766

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): 4.18

Before: 5.10.273

Vulnerable product

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

From (inclusive): 4.18

Before: 5.15.224

Vulnerable product

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

From (inclusive): 4.18

Before: 6.1.191

Vulnerable product

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

From (inclusive): 4.18

Before: 6.6.160

Vulnerable product

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

From (inclusive): 4.18

Before: 6.12.113

Vulnerable product

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

From (inclusive): 4.18

Before: 6.18.56

Vulnerable product

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

From (inclusive): 4.18

Before: 7.2.10

Vulnerable product

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

From (inclusive): 4.18

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:*:*:*:*:*:*:*:*",
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          {
            "vulnerable": true,
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          {
            "vulnerable": true,
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            "versionStartIncluding": "4.18",
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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.