{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-74552",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-74552"
  ],
  "published": "2026-08-15T12:28:42Z",
  "summary": "hwmon: (lm90) Only report alarms if driver is ready",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (lm90) Only report alarms if driver is ready\n\nUserspace can read sysfs attributes before driver registration is complete,\nimmediately after devm_hwmon_device_register_with_info() has been called.\nAt that time, data->hwmon_dev is not yet initialized. This can trigger\na NULL pointer access since lm90_update_device() and with it\nlm90_update_alarms_locked() will be called. This call schedules\nreport_work and lm90_report_alarms(), which passes the still-NULL\ndata->hwmon_dev to hwmon_notify_event() and triggers a NULL pointer\ndereference.\n\nFix the problem by only scheduling the report and alert workers\ndata->hwmon_dev is set.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.183",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-74552"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/31ce62d36d859423dc39f9902f7c4c307b2e00e3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4eed33c7db5c0c573928d28d8a2c003642c679b8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/70d9a71aa407044d70b50d356b6decf6659c4d56"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/075fce376cf852db9293481edce07c181a9b1f46"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f0b791a006512a48b6348494cb6960598fa99a58"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/aa9429edf9fc0e90d6f4da19ea4b5495a54ab117"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-19T16:47:12Z"
  }
}