{
  "cveId": "CVE-2026-74711",
  "url": "https://patchblox.com/security/cve/CVE-2026-74711",
  "summary": "CVE-2026-74711 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-74711, released September 4, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "hwmon: (pmbus) Fix type confusion in notification logic",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  hwmon: (pmbus) Fix type confusion in notification logic  Sashiko reports:  At the start of the loop in pmbus_notify(), the code unconditionally casts every attribute to a struct sensor_device_attribute:  drivers/hwmon/pmbus/pmbus_core.c:pmbus_notify() {     for (i = 0; i \u003C data-\u003Enum_attributes; i\u002B\u002B) {         struct device_attribute *da = to_dev_attr(data-\u003Egroup.attrs[i]);         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);         int index = attr-\u003Eindex; ... }  However, data-\u003Egroup.attrs can contain other types like struct pmbus_samples_reg or struct pmbus_sensor, which only embed a base struct device_attribute.  If da is a struct pmbus_samples_reg, dev_attr is the last member. Casting it to struct sensor_device_attribute and reading the index field appears to access memory past the end of the allocation, which might trigger a slab-out-of-bounds read.  Additionally, if da is a struct pmbus_sensor, casting it causes the index field to overlap with the page, phase, and reg fields. Could this produce a garbage mask on little-endian systems that spuriously matches the target reg, page, and flags during an alert?  Fix the problem by using struct sensor_device_attr in struct pmbus_sensor and struct pmbus_label. Since those attributes never trigger a notification, set the value of attr-\u003Eindex to -1 for them. Use this value to distinguish from boolean attributes which _can_ trigger a notification and use the index field to encode mask, page, and register values.",
  "published": "2026-08-22T16:16:45Z",
  "severity": "Low",
  "cvss": 8.4,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00142,
  "epssPercentile": 0.0351,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74711",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-74711",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-74711",
      "released": "2026-09-04T01:46:23Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.9-1",
      "fix": "DEBIAN-CVE-2026-74711",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-74711",
      "released": "2026-09-04T01:46:23Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}