{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-53325",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-53325"
  ],
  "published": "2026-06-29T04:52:34Z",
  "summary": "agp/amd64: Fix broken error propagation in agp_amd64_probe()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nagp/amd64: Fix broken error propagation in agp_amd64_probe()\n\nA NULL pointer dereference was observed in the AMD64 AGP driver when\nrunning in a virtualized environment (e.g. qemu/kvm) without a physical\nAMD northbridge. The crash occurs in amd64_fetch_size() when attempting\nto dereference the pointer returned by node_to_amd_nb(0).\n\nThe root cause of this crash is broken error propagation in\nagp_amd64_probe(): When no AMD northbridges are found, cache_nbs()\ncorrectly returns -ENODEV. However, the probe function erroneously\nchecks the return value against exactly -1, rather than < 0.\n\nAs a result, the hardware absence error is masked, allowing the driver\nto improperly proceed with initialization. It eventually calls\nagp_add_bridge(), which invokes amd64_fetch_size(). Since the hardware\ndoes not exist, node_to_amd_nb(0) returns NULL, leading to a General\nProtection Fault (GPF) when accessing its ->misc member.\n\nFix the issue by correcting the error check in agp_amd64_probe() to\nabort properly when cache_nbs() returns any negative error code. This\nprevents the driver from erroneously proceeding without hardware, thereby\navoiding the subsequent NULL pointer dereference at its source.",
  "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": "6.1.177",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-53325"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ce800993af477fc24187349c6a20d3073140b759"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1d7d45050e14083c1de1460c93f4063c1f0bca7b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3e844a63668d1c3d10a9d347d7ebf161b2f91c84"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/eb045714bc6a2bbb0befb7a31b996a196e188869"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/564b3b3f6565313eb6fa5355ffd037d6fb27897f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/53483a9f4ee9eeb18aa866ec16cce79e136987e1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0aa9b27c454c53074cde592eaceb442d30341585"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cefe535a60a2e00e09f4b2689b0c8ffc6912459a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b08472db93b1ccff84a7adec5779d47f0e9d3a30"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:24:08Z"
  }
}