CVE-2026-72397
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 068c227056b9223fea1a759e08db2558d5cbb5ad < 5bd0d47640395f8a8c34446b62d1781b88869dfa | affected |
| Linux | Linux | 068c227056b9223fea1a759e08db2558d5cbb5ad < 828cd614e2af053ca5e1d6da767bbd8a1b5cabfb | affected |
| Linux | Linux | 4.3 | affected |
| Linux | Linux | 0 < 4.3 | unaffected |
| Linux | Linux | 7.1.5 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/5bd0d47640395f8a8c34446b62d1781b88869dfa
- https://git.kernel.org/stable/c/828cd614e2af053ca5e1d6da767bbd8a1b5cabfb
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