CVE-2026-72397

hwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid()

CVE-2026-72397 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-72397, released August 15, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.1

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0017

6th percentile

In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid() pmbus_data2reg_vid() hardcoded the VR11 encoding regardless of the vrm_version configured by the driver, while pmbus_reg2data_vid() already switched on it. Any driver that selects a non-VR11 VID mode and exposes a regulator (or hwmon vout setter) sent dangerously wrong codes to PMBUS_VOUT_COMMAND -- e.g. an nvidia195mv part asked for 200 mV got the VR11 clamp to 500 mV encoded as 0xB2, which the chip interprets as 1080 mV. Mirror pmbus_reg2data_vid() so writes round-trip with reads.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
linux · Debian 13.5 (trixie)	6.12.115-2	DEBIAN-CVE-2026-72397	Aug 15, 2026
linux · Debian 14	7.1.5-1	DEBIAN-CVE-2026-72397	Aug 15, 2026

Details

Published
August 15, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72397

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