{"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","cwe":["CWE-681"],"vendor":"Linux","product":"Linux","affected":["Linux >= 068c227056b9223fea1a759e08db2558d5cbb5ad < cd0e037130806d7714c356eccefac6e1b92dbc34","Linux >= 068c227056b9223fea1a759e08db2558d5cbb5ad < 125a5a4ad03c74ced4c2a55db45ef03505362ff9","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":"2026-10-21","sourceUpdated":"2026-10-21T12:44:48.405Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72397","references":[{"url":"https://git.kernel.org/stable/c/cd0e037130806d7714c356eccefac6e1b92dbc34"},{"url":"https://git.kernel.org/stable/c/125a5a4ad03c74ced4c2a55db45ef03505362ff9"},{"url":"https://git.kernel.org/stable/c/5bd0d47640395f8a8c34446b62d1781b88869dfa"},{"url":"https://git.kernel.org/stable/c/828cd614e2af053ca5e1d6da767bbd8a1b5cabfb"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72397.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-72397"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516511"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72397"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72397"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081521-CVE-2026-72397-954f@gregkh/T"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00171,"epssPercentile":0.06435,"scores":{"cna":7.1,"vendor":5.5},"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 < cd0e037130806d7714c356eccefac6e1b92dbc34`\n- `Linux >= 068c227056b9223fea1a759e08db2558d5cbb5ad < 125a5a4ad03c74ced4c2a55db45ef03505362ff9`\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.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72397.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":227193,"id":"CVE-2026-72397","ts":1792586989542,"field":"cvss","old":"5.5","new":"7.1"},{"seq":227192,"id":"CVE-2026-72397","ts":1792586989542,"field":"severity","old":"medium","new":"high"},{"seq":223633,"id":"CVE-2026-72397","ts":1792238342449,"field":"cvss","old":"7.1","new":"5.5"},{"seq":223632,"id":"CVE-2026-72397","ts":1792238342449,"field":"severity","old":"high","new":"medium"}]}