In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus) Fix passing events to regulator core Sashiko reports: Commit 754bd2b4a084 ("hwmon: (pmbus/core) Protect regulator operations with mutex") introduced a worker to batch regulator events over time using atomic_or(). The delayed worker then passes the combined bitmask unmodified to regulator_notifier_call_chain(). The core regulator subsystem's regulator_handle_critical() function evaluates the event parameter using a strict switch statement. If multiple distinct faults occur before the worker runs (e.g., REGULATOR_EVENT_UNDER_VOLTAGE | REGULATOR_EVENT_OVER_CURRENT), the combined bitmask fails to match any case. This leaves the reason as NULL and completely bypasses the critical hw_protection_trigger(). Fix the problem by passing events bit by bit to the regulator event handler.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00219.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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Vendors Products
References
Link Providers
https://git.kernel.org/stable/c/2106bf4056858fcce3624e0c51f6fee4d41d3f2f cve-icon cve-icon
https://git.kernel.org/stable/c/489291b6b56978cc50d34e8e13f9636ea296ba8a cve-icon cve-icon
https://git.kernel.org/stable/c/48fe43666950efefb7ac5fbdc012c1b3604096bf cve-icon cve-icon
https://git.kernel.org/stable/c/9ef7dacd44216bf5ea05c8aef49eba4d145f4047 cve-icon cve-icon
https://git.kernel.org/stable/c/b0ff6b6ae9c5183ef701ece7016698bde5a5bfba cve-icon cve-icon
History

Sat, 15 Aug 2026 11:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-658

Sat, 15 Aug 2026 06:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus) Fix passing events to regulator core Sashiko reports: Commit 754bd2b4a084 ("hwmon: (pmbus/core) Protect regulator operations with mutex") introduced a worker to batch regulator events over time using atomic_or(). The delayed worker then passes the combined bitmask unmodified to regulator_notifier_call_chain(). The core regulator subsystem's regulator_handle_critical() function evaluates the event parameter using a strict switch statement. If multiple distinct faults occur before the worker runs (e.g., REGULATOR_EVENT_UNDER_VOLTAGE | REGULATOR_EVENT_OVER_CURRENT), the combined bitmask fails to match any case. This leaves the reason as NULL and completely bypasses the critical hw_protection_trigger(). Fix the problem by passing events bit by bit to the regulator event handler.
Title hwmon: (pmbus) Fix passing events to regulator core
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:56:22.400Z

Reserved: 2026-08-09T03:40:39.924Z

Link: CVE-2026-72395

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:22:13.043

Modified: 2026-08-15T06:22:13.043

Link: CVE-2026-72395

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T11:30:07Z