High 7.1Published Aug 15, 2026

CVE-2026-72397hwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid()

Updated under an hour ago (Oct 27, 2026, 11:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

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: Oct 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 068c227056b9223fea1a759e08db2558d5cbb5ad before cd0e037130806d7714c356eccefac6e1b92dbc34; from 068c227056b9223fea1a759e08db2558d5cbb5ad before 125a5a4ad03c74ced4c2a55db45ef03505362ff9; 068c227056b9223fea1a759e08db2558d5cbb5ad builds before 5bd0d47640395f8a8c34446b62d1781b88869dfa; from 068c227056b9223fea1a759e08db2558d5cbb5ad before 828cd614e2af053ca5e1d6da767bbd8a1b5cabfb	CNA record

References

References

https://git.kernel.org/stable/c/cd0e037130806d7714c356eccefac6e1b92dbc34
https://git.kernel.org/stable/c/125a5a4ad03c74ced4c2a55db45ef03505362ff9
https://git.kernel.org/stable/c/5bd0d47640395f8a8c34446b62d1781b88869dfa
https://git.kernel.org/stable/c/828cd614e2af053ca5e1d6da767bbd8a1b5cabfb

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.