CVE-2026-90028Hinoki check available

Unbalanced VBUS disable via aggregate regulator state

Published Sep 16, 2026 · Updated Sep 16, 2026

Improper regulator state tracking in Linux 7.0 allows attackers to cause an unbalanced VBUS disable via Type-C role changes. The hd3ss3220 driver relies on regulator_is_enabled(), which reports aggregate state, then skips its own enable reference and later releases a reference it never acquired. The condition requires another regulator consumer to enable VBUS before the driver handles a later role or ID notification; the published impact is an unbalanced-disable warning, with no further system consequence specified.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper regulator state tracking in Linux 7.0 allows attackers to cause an unbalanced VBUS disable via Type-C role changes. The hd3ss3220 driver relies on regulator_is_enabled(), which reports aggregate state, then skips its own enable reference and later releases a reference it never acquired. The condition requires another regulator consumer to enable VBUS before the driver handles a later role or ID notification; the published impact is an unbalanced-disable warning, with no further system consequence specified.

The record

CVE
CVE-2026-90028
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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?

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  1. Affected versionversion=7.0
  2. Affected versionversion=b3f9d6e491fda73c319547881b78cdd2a222b293 <c9a48db776d7184981630ecc01a3ad30a8f7dc24
  3. Affected versionversion=b3f9d6e491fda73c319547881b78cdd2a222b293 <df7cd3908e07503fa7e9737dacf44208530e58d9

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=7.0; version=b3f9d6e491fda73c319547881b78cdd2a222b293 <c9a48db776d7184981630ecc01a3ad30a8f7dc24; version=b3f9d6e491fda73c319547881b78cdd2a222b293 <df7cd3908e07503fa7e9737dacf44208530e58d9

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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