CVE-2023-53446 (GCVE-0-2023-53446)
Vulnerability from cvelistv5
Published
2025-09-18 16:04
Modified
2025-09-18 16:04
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free Struct pcie_link_state->downstream is a pointer to the pci_dev of function 0. Previously we retained that pointer when removing function 0, and subsequent ASPM policy changes dereferenced it, resulting in a use-after-free warning from KASAN, e.g.: # echo 1 > /sys/bus/pci/devices/0000:03:00.0/remove # echo powersave > /sys/module/pcie_aspm/parameters/policy BUG: KASAN: slab-use-after-free in pcie_config_aspm_link+0x42d/0x500 Call Trace: kasan_report+0xae/0xe0 pcie_config_aspm_link+0x42d/0x500 pcie_aspm_set_policy+0x8e/0x1a0 param_attr_store+0x162/0x2c0 module_attr_store+0x3e/0x80 PCIe spec r6.0, sec 7.5.3.7, recommends that software program the same ASPM Control value in all functions of multi-function devices. Disable ASPM and free the pcie_link_state when any child function is removed so we can discard the dangling pcie_link_state->downstream pointer and maintain the same ASPM Control configuration for all functions. [bhelgaas: commit log and comment]
Impacted products
Vendor Product Version
Linux Linux Version: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06
Version: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06
Version: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06
Version: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06
Version: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06
Version: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06
Version: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06
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   Linux Linux Version: 4.11
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/pcie/aspm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/pcie/aspm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.11"
            },
            {
              "lessThan": "4.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.251",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.3.*",
              "status": "unaffected",
              "version": "6.3.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.251",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.188",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.121",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.39",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3.13",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.4",
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                },
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                  "versionEndExcluding": "6.5",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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-\u003edownstream 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 \u003e /sys/bus/pci/devices/0000:03:00.0/remove\n  # echo powersave \u003e /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-\u003edownstream pointer\nand maintain the same ASPM Control configuration for all functions.\n\n[bhelgaas: commit log and comment]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-18T16:04:21.939Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/666e7f9d60cee23077ea3e6331f6f8a19f7ea03f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7badf4d6f49a358a01ab072bbff88d3ee886c33b"
        },
        {
          "url": "https://git.kernel.org/stable/c/9856c0de49052174ab474113f4ba40c02aaee086"
        },
        {
          "url": "https://git.kernel.org/stable/c/7aecdd47910c51707696e8b0e045b9f88bd4230f"
        },
        {
          "url": "https://git.kernel.org/stable/c/d51d2eeae4ce54d542909c4d9d07bf371a78592c"
        },
        {
          "url": "https://git.kernel.org/stable/c/4203722d51afe3d239e03f15cc73efdf023a7103"
        },
        {
          "url": "https://git.kernel.org/stable/c/456d8aa37d0f56fc9e985e812496e861dcd6f2f2"
        }
      ],
      "title": "PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53446",
    "datePublished": "2025-09-18T16:04:21.939Z",
    "dateReserved": "2025-09-17T14:54:09.753Z",
    "dateUpdated": "2025-09-18T16:04:21.939Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53446\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-18T16:15:48.940\",\"lastModified\":\"2025-09-19T16:00:27.847\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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-\u003edownstream 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 \u003e /sys/bus/pci/devices/0000:03:00.0/remove\\n  # echo powersave \u003e /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-\u003edownstream pointer\\nand maintain the same ASPM Control configuration for all functions.\\n\\n[bhelgaas: commit log and comment]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4203722d51afe3d239e03f15cc73efdf023a7103\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/456d8aa37d0f56fc9e985e812496e861dcd6f2f2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/666e7f9d60cee23077ea3e6331f6f8a19f7ea03f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7aecdd47910c51707696e8b0e045b9f88bd4230f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7badf4d6f49a358a01ab072bbff88d3ee886c33b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9856c0de49052174ab474113f4ba40c02aaee086\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d51d2eeae4ce54d542909c4d9d07bf371a78592c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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