CVE-2026-98766

Freed-memory access via uncanceled USB wake work

Published Oct 18, 2026 · Updated Oct 18, 2026

Use-after-free in the aspeed-vhub driver in Linux 4.18 allows attackers to access freed memory during USB device removal. ast_vhub_remove() leaves wake_work pending, while ast_vhub_udc_wakeup() permits rearming after gadget unregistration, allowing work to outlive freed hub and port objects. The race requires gadget wakeup concurrent with driver removal on affected Aspeed hardware; attacker privileges and further consequences are undocumented.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the aspeed-vhub driver in Linux 4.18 allows attackers to access freed memory during USB device removal. ast_vhub_remove() leaves wake_work pending, while ast_vhub_udc_wakeup() permits rearming after gadget unregistration, allowing work to outlive freed hub and port objects. The race requires gadget wakeup concurrent with driver removal on affected Aspeed hardware; attacker privileges and further consequences are undocumented.

The record

CVE
CVE-2026-98766
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.18
  2. Affected versionversion=7ecca2a4080cb6b1fa174adc588fce9e9014c43c <20388c8d1d74c203fec8194c45cd31afdfab934e
  3. Affected versionversion=7ecca2a4080cb6b1fa174adc588fce9e9014c43c <474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d
  4. Affected versionversion=7ecca2a4080cb6b1fa174adc588fce9e9014c43c <c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1
  5. Affected versionversion=7ecca2a4080cb6b1fa174adc588fce9e9014c43c <f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.18; version=7ecca2a4080cb6b1fa174adc588fce9e9014c43c <20388c8d1d74c203fec8194c45cd31afdfab934e; version=7ecca2a4080cb6b1fa174adc588fce9e9014c43c <474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d; version=7ecca2a4080cb6b1fa174adc588fce9e9014c43c <c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1; version=7ecca2a4080cb6b1fa174adc588fce9e9014c43c <f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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