hwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid()

{
  "id": "b8674aeef6325cb4860d072cb0545ee41de722a18a51d0e2a9b658ca2b1ba677",
  "url": "https://osv.dev/vulnerability/CVE-2026-72397",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "hwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid()",
    "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.",
    "evidence": "osv:CVE-2026-72397",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.160",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-72397",
      "aliases": [
        "CVE-2026-72397"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "068c227056b9223fea1a759e08db2558d5cbb5ad"
                },
                {
                  "fixed": "cd0e037130806d7714c356eccefac6e1b92dbc34"
                },
                {
                  "fixed": "125a5a4ad03c74ced4c2a55db45ef03505362ff9"
                },
                {
                  "fixed": "5bd0d47640395f8a8c34446b62d1781b88869dfa"
                },
                {
                  "fixed": "828cd614e2af053ca5e1d6da767bbd8a1b5cabfb"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72397.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.3.0"
                },
                {
                  "fixed": "6.6.160"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72397.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.032697233Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/125a5a4ad03c74ced4c2a55db45ef03505362ff9",
        "https://git.kernel.org/stable/c/5bd0d47640395f8a8c34446b62d1781b88869dfa",
        "https://git.kernel.org/stable/c/828cd614e2af053ca5e1d6da767bbd8a1b5cabfb",
        "https://git.kernel.org/stable/c/cd0e037130806d7714c356eccefac6e1b92dbc34",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72397.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72397",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72397.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72397",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521925,
  "published_at": "2026-08-15T05:56:23.675+00:00"
}