{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-74547",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-74547"
  ],
  "published": "2026-08-15T12:28:42Z",
  "summary": "hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (adt7470) Fix busy-loop and I2C flooding in update thread\n\nWhen userspace configures 'auto_update_interval' to 0 via sysfs, the\nbackground kthread executes schedule_timeout_interruptible(0), which\nreturns immediately.\n\nIf 'num_temp_sensors' is concurrently or previously set to 0, the\nmsleep_interruptible() delay inside adt7470_read_temperatures() also\nbecomes 0. This combination forces the background thread into a tight,\nunbounded busy-loop, hogging the CPU and flooding the I2C bus with a\ncontinuous stream of transactions.\n\nFix this vulnerability by raising the lower limit of the clamp_val in\nauto_update_interval_store() from 0 to 500 milliseconds. This guarantees\na reasonable minimum sleep window between sensor updates, protecting the\nsystem from intentional or accidental I2C bus denial of service.",
  "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-2026-74547"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4dc1518f9cc57c6db99514cafeb02dd7117d5bda"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1325975a2eab265510e6036d8bf0c0068373d332"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1a42bd72a66205e439db1d1142442b62d393408a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/38e6b5ce5794ff09442231cc171c2be5e900bab3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/82d65f7ef11edcea0228745440b8b4b1f222c34c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5ea299c3aa42a827f6a863eeead6de3525bbb17a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cb0b7f9c43b0abbd422a7e4c2c85e91db429207c"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-19T16:47:12Z"
  }
}