{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-89936",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-89936"
  ],
  "published": "2026-09-16T10:32:03Z",
  "summary": "iio: dac: m62332: Fix regulator reference count imbalance",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: dac: m62332: Fix regulator reference count imbalance\n\nm62332_set_value() enables the Vcc regulator on every write of a\nnon-zero value and disables it on every write of zero, without tracking\nthe channel's current state. Because the regulator is reference counted,\nchanging a channel directly from one non-zero value to another enables\nit more than once, while a later write of zero disables it only once.\nThe reference count never returns to zero and the regulator is left\nenabled indefinitely.\n\nOnly enable the regulator on the transition from zero to non-zero, and\nonly disable it on the transition from non-zero to zero, using the\npreviously stored channel value to detect the edge. Balance the\nregulator on the I2C error path so the reference count stays consistent\nif the write fails.",
  "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": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-89936"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bac0ed8bee651aa841375edf72c6ab1d10ac80c6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9263b9ad968a563337a60e0eb66e35186e1faf9a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1d3a7d7dd3adee19e00be2b2237140f0fe169484"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f5acb824277a97a5210c454872202bf7f08c75d4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ae18d2d2ef27a4d04fda6e30c23774513dc9be1e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9fe22f563b2a0fdb11fd3711a8c39c023629c08a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a130404ce0b69ca1438126bd81c1985d3b4d2e6f"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-16T10:32:03Z"
  }
}