{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-71111",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-71111"
  ],
  "published": "2026-01-14T15:06:27Z",
  "summary": "hwmon: (w83791d) Convert macros to functions to avoid TOCTOU",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (w83791d) Convert macros to functions to avoid TOCTOU\n\nThe macro FAN_FROM_REG evaluates its arguments multiple times. When used\nin lockless contexts involving shared driver data, this leads to\nTime-of-Check to Time-of-Use (TOCTOU) race conditions, potentially\ncausing divide-by-zero errors.\n\nConvert the macro to a static function. This guarantees that arguments\nare evaluated only once (pass-by-value), preventing the race\nconditions.\n\nAdditionally, in store_fan_div, move the calculation of the minimum\nlimit inside the update lock. This ensures that the read-modify-write\nsequence operates on consistent data.\n\nAdhere to the principle of minimal changes by only converting macros\nthat evaluate arguments multiple times and are used in lockless\ncontexts.",
  "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": "6.1.160",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-71111"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3dceb68f6ad33156032ef4da21a93d84059cca6d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bf5b03227f2e6d4360004886d268f9df8993ef8f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f2b579a0c37c0df19603d719894a942a295f634a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f94800fbc26ccf7c81eb791707b038a57aa39a18"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a9fb6e8835a22f5796c1182ed612daed3fd273af"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c8cf0c2bdcccc6634b6915ff793b844e12436680"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/670d7ef945d3a84683594429aea6ab2cdfa5ceb4"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}