{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-68104",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-68104"
  ],
  "published": "2026-08-10T12:08:00Z",
  "summary": "drm/amdgpu: invoke pm_genpd_remove() before freeing genpd",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: invoke pm_genpd_remove() before freeing genpd\n\nCall pm_genpd_remove() to unregister from global list prior to releasing\nacp_genpd memory, and clear the pointer after free.\n\n(cherry picked from commit cd8650d7a91ee8b768e202354672553faa5cc1f2)",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "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-2026-68104"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4d7c10b0bf09d90c81818752decbdb1966b62702"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/493adf29d66f23888f0e29888b6bc9512acd0825"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2e406b86144c1f732eb344f1f1e09043856cfc33"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bdfc7f1e0900ef1361b828c4f69b72701f8a0a86"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5c0a82283271759fff445ac27182072f200a888c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/08fee493e0261f9e4120a5c8e7e42e8a723574e8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/930a5dc3df4aa5e10393134bd5313d616dbebaf6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/28c9b3c5dc35cc790d11e26ca3fc6e068be63998"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-19T16:47:12Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The bug is in acp_hw_fini during amdgpu driver teardown (amdgpu_pci_remove/amdgpu_driver_unload_kms), reachable via local PCI unbind/module unload or a failed amdgpu init cleanup after opening a DRM render node; there is no network-facing entry point.\nAC:L - Once the AMDGPU ACP block has been initialized, calling acp_hw_fini deterministically frees acp_genpd without unregistering it from the global genpd list; no race or special memory layout is required to leave a dangling list entry.\nPR:L - Unprivileged users with access to /dev/dri/renderD* can autoload amdgpu and trigger the fini path if initialization fails after ACP setup; the same bug also fires on privileged driver unload/hot-unplug teardown of AMDGPU on ACP-capable APUs (Carrizo/Stoney).\nUI:N - Exploitation does not require any victim interaction such as clicking links or mounting filesystems; triggering driver teardown or a failed init cleanup is sufficient once the attacker can open the DRM device or unload the driver.\nS:U - The use-after-free corrupts kernel heap metadata/objects in the same kernel security domain during AMDGPU/ACP teardown; it does not by itself cross VM, container, or IOMMU boundaries to impact a separate authority.\nC:H - Freeing the generic_pm_domain while it remains linked on the global gpd_list is a kernel use-after-free; subsequent genpd list walks can read attacker-influenced freed memory, enabling information disclosure and kernel pointer leaks.\nI:H - The dangling genpd entry allows the power-domain core to perform reads/writes through a freed acp_pm_domain/generic_pm_domain object, providing a standard heap UAF primitive that can be developed into arbitrary kernel memory corruption or code execution.\nA:H - Dereferencing the freed genpd from the global list during later power-management operations can cause kernel oops/panic or hang, and the UAF can be leveraged for a reliable denial-of-service even when full exploitation is not attempted."
    }
  }
}