{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-53446",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-53446"
  ],
  "published": "2025-09-18T16:08:26Z",
  "summary": "PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free\n\nStruct pcie_link_state->downstream is a pointer to the pci_dev of function\n0.  Previously we retained that pointer when removing function 0, and\nsubsequent ASPM policy changes dereferenced it, resulting in a\nuse-after-free warning from KASAN, e.g.:\n\n  # echo 1 > /sys/bus/pci/devices/0000:03:00.0/remove\n  # echo powersave > /sys/module/pcie_aspm/parameters/policy\n\n  BUG: KASAN: slab-use-after-free in pcie_config_aspm_link+0x42d/0x500\n  Call Trace:\n   kasan_report+0xae/0xe0\n   pcie_config_aspm_link+0x42d/0x500\n   pcie_aspm_set_policy+0x8e/0x1a0\n   param_attr_store+0x162/0x2c0\n   module_attr_store+0x3e/0x80\n\nPCIe spec r6.0, sec 7.5.3.7, recommends that software program the same ASPM\nControl value in all functions of multi-function devices.\n\nDisable ASPM and free the pcie_link_state when any child function is\nremoved so we can discard the dangling pcie_link_state->downstream pointer\nand maintain the same ASPM Control configuration for all functions.\n\n[bhelgaas: commit log and comment]",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.21-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v8",
            "binary_version": "1:6.1.21-1+rpt1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.21-1+rpt1": {
            "linux_commit": "0afb5e98488aed7017b9bf321b575d0177feb7ed",
            "upstream_version": "6.1.21",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.39"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-53446"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/666e7f9d60cee23077ea3e6331f6f8a19f7ea03f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7badf4d6f49a358a01ab072bbff88d3ee886c33b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9856c0de49052174ab474113f4ba40c02aaee086"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7aecdd47910c51707696e8b0e045b9f88bd4230f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d51d2eeae4ce54d542909c4d9d07bf371a78592c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4203722d51afe3d239e03f15cc73efdf023a7103"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/456d8aa37d0f56fc9e985e812496e861dcd6f2f2"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}