CVE-2026-72397

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.

Package Linux Kernel
Published 2026-08-15
Last modified 2026-08-15
Patch available
Yes

Affected versions

Linux kernel versions 4.3 and later are affected. Fixed in 7.1.5, 7.2-rc2 and their respective stable series.

Affected from
≥ 4.3
Fixed in
✓ 7.1.5 7.1.x ✓ 7.2-rc2

References

2 total

Frequently asked questions

  • What is CVE-2026-72397?

    CVE-2026-72397 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.3 onward and has been patched in 7.1.5 and 7.2-rc2. CVE-2026-72397 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • Is there a patch available for CVE-2026-72397?

    Yes. CVE-2026-72397 has been patched. Fixed versions include 7.1.5 and 7.2-rc2. If you are running Linux kernel 4.3 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-72397 actively exploited?

    No. CVE-2026-72397 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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