---
id: CVE-2026-72395
title: 'hwmon: (pmbus) Fix passing events to regulator core'
summary: |-
  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 …
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= b26849cffaa7c43355b82e9bef3725e786973a1a <
    2106bf4056858fcce3624e0c51f6fee4d41d3f2f
  - >-
    Linux >= acf04e2863132f6d9222f71f3a76fb9782cbe061 <
    48fe43666950efefb7ac5fbdc012c1b3604096bf
  - >-
    Linux >= 4e9d723d9f198b86f6882a84c501ba1f39e8d055 <
    489291b6b56978cc50d34e8e13f9636ea296ba8a
  - >-
    Linux >= 754bd2b4a084b90b5e7b630e1f423061a9b9b761 <
    b0ff6b6ae9c5183ef701ece7016698bde5a5bfba
  - >-
    Linux >= 754bd2b4a084b90b5e7b630e1f423061a9b9b761 <
    9ef7dacd44216bf5ea05c8aef49eba4d145f4047
  - Linux f0c9ea9c3a208e79c812e10e2bcef87b46564f01
  - Linux 2c77ae315f3ce9d2c8e1609be74c9358c1fe4e07
  - Linux >= 6.6.143 < 6.6.145
  - Linux >= 6.12.92 < 6.12.97
  - Linux >= 6.18.21 < 6.18.40
  - Linux >= 6.1.191 < 6.2
  - Linux >= 6.19.11 < 6.20
  - Linux 7.0
published: '2026-08-15'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T12:29:15.667Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72395'
references:
  - url: 'https://git.kernel.org/stable/c/2106bf4056858fcce3624e0c51f6fee4d41d3f2f'
  - url: 'https://git.kernel.org/stable/c/48fe43666950efefb7ac5fbdc012c1b3604096bf'
  - url: 'https://git.kernel.org/stable/c/489291b6b56978cc50d34e8e13f9636ea296ba8a'
  - url: 'https://git.kernel.org/stable/c/b0ff6b6ae9c5183ef701ece7016698bde5a5bfba'
  - url: 'https://git.kernel.org/stable/c/9ef7dacd44216bf5ea05c8aef49eba4d145f4047'
tags:
  - cve.org
epss: 0.00182
epssPercentile: 0.07809
ingestedAt: '2026-11-05T15:02:32.504Z'
---

## Overview

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.

## Affected

- `Linux >= b26849cffaa7c43355b82e9bef3725e786973a1a < 2106bf4056858fcce3624e0c51f6fee4d41d3f2f`
- `Linux >= acf04e2863132f6d9222f71f3a76fb9782cbe061 < 48fe43666950efefb7ac5fbdc012c1b3604096bf`
- `Linux >= 4e9d723d9f198b86f6882a84c501ba1f39e8d055 < 489291b6b56978cc50d34e8e13f9636ea296ba8a`
- `Linux >= 754bd2b4a084b90b5e7b630e1f423061a9b9b761 < b0ff6b6ae9c5183ef701ece7016698bde5a5bfba`
- `Linux >= 754bd2b4a084b90b5e7b630e1f423061a9b9b761 < 9ef7dacd44216bf5ea05c8aef49eba4d145f4047`
- `Linux f0c9ea9c3a208e79c812e10e2bcef87b46564f01`
- `Linux 2c77ae315f3ce9d2c8e1609be74c9358c1fe4e07`
- `Linux >= 6.6.143 < 6.6.145`
- `Linux >= 6.12.92 < 6.12.97`
- `Linux >= 6.18.21 < 6.18.40`
- `Linux >= 6.1.191 < 6.2`
- `Linux >= 6.19.11 < 6.20`
- `Linux 7.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.