{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-52840",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-52840"
  ],
  "published": "2024-05-21T15:34:20Z",
  "summary": "Input: synaptics-rmi4 - fix use after free in rmi_unregister_function()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: synaptics-rmi4 - fix use after free in rmi_unregister_function()\n\nThe put_device() calls rmi_release_function() which frees \"fn\" so the\ndereference on the next line \"fn->num_of_irqs\" is a use after free.\nMove the put_device() to the end to fix this.",
  "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": "6.1.63",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-52840"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2f236d8638f5b43e0c72919a6a27fe286c32053f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/50d12253666195a14c6cd2b81c376e2dbeedbdff"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6c71e065befb2fae8f1461559b940c04e1071bd5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/303766bb92c5c225cf40f9bbbe7e29749406e2f2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7082b1fb5321037bc11ba1cf2d7ed23c6b2b521f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cc56c4d17721dcb10ad4e9c9266e449be1462683"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c8e639f5743cf4b01f8c65e0df075fe4d782b585"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/eb988e46da2e4eae89f5337e047ce372fe33d5b1"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}