CVE-2026-72395hwmon: (pmbus) Fix passing events to regulator core
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from b26849cffaa7c43355b82e9bef3725e786973a1a before 2106bf4056858fcce3624e0c51f6fee4d41d3f2f; from acf04e2863132f6d9222f71f3a76fb9782cbe061 before 48fe43666950efefb7ac5fbdc012c1b3604096bf; from 4e9d723d9f198b86f6882a84c501ba1f39e8d055 before 489291b6b56978cc50d34e8e13f9636ea296ba8a; from 754bd2b4a084b90b5e7b630e1f423061a9b9b761 before b0ff6b6ae9c5183ef701ece7016698bde5a5bfba; 754bd2b4a084b90b5e7b630e1f423061a9b9b761 builds before 9ef7dacd44216bf5ea05c8aef49eba4d145f4047; 2c77ae315f3ce9d2c8e1609be74c9358c1fe4e07; from 6.6.143 before 6.6.145; from 6.12.92 before 6.12.97; and 2 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/2106bf4056858fcce3624e0c51f6fee4d41d3f2f
- https://git.kernel.org/stable/c/48fe43666950efefb7ac5fbdc012c1b3604096bf
- https://git.kernel.org/stable/c/489291b6b56978cc50d34e8e13f9636ea296ba8a
- https://git.kernel.org/stable/c/b0ff6b6ae9c5183ef701ece7016698bde5a5bfba
- https://git.kernel.org/stable/c/9ef7dacd44216bf5ea05c8aef49eba4d145f4047
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.