{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-43313",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-43313"
  ],
  "published": "2026-05-08T13:13:56Z",
  "summary": "ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()\n\nIn acpi_processor_errata_piix4(), the pointer dev is first assigned an IDE\ndevice and then reassigned an ISA device:\n\n  dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB, ...);\n  dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB_0, ...);\n\nIf the first lookup succeeds but the second fails, dev becomes NULL. This\nleads to a potential null-pointer dereference when dev_dbg() is called:\n\n  if (errata.piix4.bmisx)\n    dev_dbg(&dev->dev, ...);\n\nTo prevent this, use two temporary pointers and retrieve each device\nindependently, avoiding overwriting dev with a possible NULL value.\n\n[ rjw: Subject adjustment, added an empty code line ]",
  "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": "6.1.165",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-43313"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ad86ac604f8391c0212a91412d4f764c7a85f254"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/01e8751b37a366b1ca561add0042f2ceb18c03bf"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b803811485ac0b2f774b6bf3abc8b999ba3b7033"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/29f60d3d06818d40118a30d663231f027ae87a05"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0398b641be2b66c2fc7e0163c606ef19372e7ad5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f132e089fe89cadc2098991f0a3cb05c3f824ac6"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}