{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-80952",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-80952"
  ],
  "published": "2026-09-11T19:47:07Z",
  "summary": "i3c: master: Fix info leak and UAF in device unregister path",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: master: Fix info leak and UAF in device unregister path\n\ni3c_master_unregister_i3c_devs() clears i3cdev->dev->desc before\ncalling device_unregister().  During device_unregister(),\ndevice_del() emits a KOBJ_REMOVE uevent and unbinds the driver while\nthe device descriptor is still expected to be valid.  As a result,\ni3c_device_uevent() and a racing modalias_show() can observe a NULL\ndesc and fall back to an uninitialized stack struct i3c_device_info,\nleaking kernel stack contents in the generated modalias.  Driver\n.remove() callbacks may also encounter an unexpected NULL desc during\nunbind.\n\nKeep desc valid until device_unregister() has completed.  Since\ndevice_unregister() drops the device reference and may free the device,\ntake an extra reference with get_device() before unregistering.  Clear\ndesc afterwards and release the extra reference with put_device().\nThis preserves the release-time invariant that desc must be NULL while\navoiding both the information leak and a potential use-after-free from\nwriting desc after the device has been released.",
  "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-2026-80952"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/334cfb5e285cece5dc49fb3fb8ea9b70b2cb5d7e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/109995153898454c7795c2c299fd0a0b57456a4b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c64daaaba08e490c8347ff60aacac4dd51249f91"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ef72ff6650c4ebf2b444708d84df66db42f262d9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c16b6f25e0cc2dd1055dde1256cbf5a9e888cf49"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/94fb9786d67a8f8b899e77381620f86bad94fdf7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4837be0f9ac2efe5e83b35a696b6242c473d280c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d2c743efd2d1ee64e94324664808f623dd865872"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-14T12:06:03Z"
  }
}