Linux Kernel USB Type-C hd3ss3220 Regulator Ref Balance Issue
CVE-2026-90028 Published on September 16, 2026
usb: typec: hd3ss3220: track VBUS enable state per consumer
In the Linux kernel, the following vulnerability has been resolved:
usb: typec: hd3ss3220: track VBUS enable state per consumer
regulator_is_enabled() reports the aggregate regulator state, not
whether this consumer holds an enable reference. If another consumer
enables VBUS first, the driver can skip its own regulator_enable() call
and later attempt to drop a reference it never acquired, triggering an
unbalanced regulator disable warning.
Track successful enable and disable calls locally. Keep the state
unchanged when an operation fails so a later role or ID notification
retries the operation while this consumer keeps balanced references.
Products Associated with CVE-2026-90028
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Affected Versions
Linux:- Version b3f9d6e491fda73c319547881b78cdd2a222b293 and below df7cd3908e07503fa7e9737dacf44208530e58d9 is affected.
- Version b3f9d6e491fda73c319547881b78cdd2a222b293 and below c9a48db776d7184981630ecc01a3ad30a8f7dc24 is affected.
- Version 7.0 is affected.
- Before 7.0 is unaffected.
- Version 7.2.5, <= 7.2.* is unaffected.
- Version 7.3-rc2, <= * is unaffected.