CVE-2023-53446 (GCVE-0-2023-53446)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:04 – Updated: 2026-05-11 19:45
VLAI
Title
PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free
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]
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06 , < 666e7f9d60cee23077ea3e6331f6f8a19f7ea03f (git)
Affected: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06 , < 7badf4d6f49a358a01ab072bbff88d3ee886c33b (git)
Affected: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06 , < 9856c0de49052174ab474113f4ba40c02aaee086 (git)
Affected: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06 , < 7aecdd47910c51707696e8b0e045b9f88bd4230f (git)
Affected: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06 , < d51d2eeae4ce54d542909c4d9d07bf371a78592c (git)
Affected: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06 , < 4203722d51afe3d239e03f15cc73efdf023a7103 (git)
Affected: b5a0a9b59c8185aebcd9a717e2e6258b58c72c06 , < 456d8aa37d0f56fc9e985e812496e861dcd6f2f2 (git)
Create a notification for this product.
Linux Linux Affected: 4.11
Unaffected: 0 , < 4.11 (semver)
Unaffected: 5.4.251 , ≤ 5.4.* (semver)
Unaffected: 5.10.188 , ≤ 5.10.* (semver)
Unaffected: 5.15.121 , ≤ 5.15.* (semver)
Unaffected: 6.1.39 , ≤ 6.1.* (semver)
Unaffected: 6.3.13 , ≤ 6.3.* (semver)
Unaffected: 6.4.4 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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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\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.11\",\"versionEndExcluding\":\"5.4.251\",\"matchCriteriaId\":\"2379FC6F-4DA2-43DA-AF1D-FC188CB1FB6B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.188\",\"matchCriteriaId\":\"43CAE50A-4A6C-488E-813C-F8DB77C13C8B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.121\",\"matchCriteriaId\":\"EC77775B-EC31-4966-966C-1286C02B2A85\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.39\",\"matchCriteriaId\":\"9BD1D4A1-304D-4187-8178-6D7C0050B1AF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.3.13\",\"matchCriteriaId\":\"95CB4836-7F5D-4C20-B025-8E046EC87B78\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4\",\"versionEndExcluding\":\"6.4.4\",\"matchCriteriaId\":\"6AB81046-CB69-4115-924C-963B37C41385\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4203722d51afe3d239e03f15cc73efdf023a7103\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/456d8aa37d0f56fc9e985e812496e861dcd6f2f2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/666e7f9d60cee23077ea3e6331f6f8a19f7ea03f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7aecdd47910c51707696e8b0e045b9f88bd4230f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7badf4d6f49a358a01ab072bbff88d3ee886c33b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9856c0de49052174ab474113f4ba40c02aaee086\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d51d2eeae4ce54d542909c4d9d07bf371a78592c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-53446\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T19:19:38.678315Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T19:19:33.416Z\"}}], \"cna\": {\"title\": \"PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"b5a0a9b59c8185aebcd9a717e2e6258b58c72c06\", \"lessThan\": \"666e7f9d60cee23077ea3e6331f6f8a19f7ea03f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b5a0a9b59c8185aebcd9a717e2e6258b58c72c06\", \"lessThan\": \"7badf4d6f49a358a01ab072bbff88d3ee886c33b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b5a0a9b59c8185aebcd9a717e2e6258b58c72c06\", \"lessThan\": \"9856c0de49052174ab474113f4ba40c02aaee086\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b5a0a9b59c8185aebcd9a717e2e6258b58c72c06\", \"lessThan\": \"7aecdd47910c51707696e8b0e045b9f88bd4230f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b5a0a9b59c8185aebcd9a717e2e6258b58c72c06\", \"lessThan\": \"d51d2eeae4ce54d542909c4d9d07bf371a78592c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b5a0a9b59c8185aebcd9a717e2e6258b58c72c06\", \"lessThan\": \"4203722d51afe3d239e03f15cc73efdf023a7103\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b5a0a9b59c8185aebcd9a717e2e6258b58c72c06\", \"lessThan\": \"456d8aa37d0f56fc9e985e812496e861dcd6f2f2\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/pci/pcie/aspm.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.11\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.11\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.251\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.188\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.121\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.39\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.3.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.3.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/pci/pcie/aspm.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.251\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.188\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.121\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.39\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.3.13\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.4\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5\", \"versionStartIncluding\": \"4.11\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:45:09.783Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53446\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:45:09.783Z\", \"dateReserved\": \"2025-09-17T14:54:09.753Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-18T16:04:21.939Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.