{"id":"CVE-2026-72397","title":"hwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid()\n\npmbus_data2reg_vid() hardcoded the VR11 encoding regardless of the\nvrm_version configured by the driver, …","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 068c227056b9223fea1a759e08db2558d5cbb5ad < 5bd0d47640395f8a8c34446b62d1781b88869dfa","Linux >= 068c227056b9223fea1a759e08db2558d5cbb5ad < 828cd614e2af053ca5e1d6da767bbd8a1b5cabfb","Linux 4.3"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T18:48:52.527560Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:55:21.400Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72397","references":[{"url":"https://git.kernel.org/stable/c/5bd0d47640395f8a8c34446b62d1781b88869dfa"},{"url":"https://git.kernel.org/stable/c/828cd614e2af053ca5e1d6da767bbd8a1b5cabfb"}],"tags":["cve.org"],"epss":0.00151,"epssPercentile":0.03884,"ingestedAt":"2026-10-16T19:46:24.400Z","slug":"CVE-2026-72397","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid()\n\npmbus_data2reg_vid() hardcoded the VR11 encoding regardless of the\nvrm_version configured by the driver, while pmbus_reg2data_vid()\nalready switched on it. Any driver that selects a non-VR11 VID mode\nand exposes a regulator (or hwmon vout setter) sent dangerously\nwrong codes to PMBUS_VOUT_COMMAND -- e.g. an nvidia195mv part asked\nfor 200 mV got the VR11 clamp to 500 mV encoded as 0xB2, which the\nchip interprets as 1080 mV.\n\nMirror pmbus_reg2data_vid() so writes round-trip with reads.\n\n## Affected\n\n- `Linux >= 068c227056b9223fea1a759e08db2558d5cbb5ad < 5bd0d47640395f8a8c34446b62d1781b88869dfa`\n- `Linux >= 068c227056b9223fea1a759e08db2558d5cbb5ad < 828cd614e2af053ca5e1d6da767bbd8a1b5cabfb`\n- `Linux 4.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}