CVE-2024-58093 (GCVE-0-2024-58093)
Vulnerability from cvelistv5
Published
2025-04-16 14:11
Modified
2025-05-26 05:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI/ASPM: Fix link state exit during switch upstream function removal Before 456d8aa37d0f ("PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free"), we would free the ASPM link only after the last function on the bus pertaining to the given link was removed. That was too late. If function 0 is removed before sibling function, link->downstream would point to free'd memory after. After above change, we freed the ASPM parent link state upon any function removal on the bus pertaining to a given link. That is too early. If the link is to a PCIe switch with MFD on the upstream port, then removing functions other than 0 first would free a link which still remains parent_link to the remaining downstream ports. The resulting GPFs are especially frequent during hot-unplug, because pciehp removes devices on the link bus in reverse order. On that switch, function 0 is the virtual P2P bridge to the internal bus. Free exactly when function 0 is removed -- before the parent link is obsolete, but after all subordinate links are gone. [kwilczynski: commit log]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cbf937dcadfd571a434f8074d057b32cd14fbea5
Impacted products
Vendor Product Version
Linux Linux Version: 456d8aa37d0f56fc9e985e812496e861dcd6f2f2
Version: 666e7f9d60cee23077ea3e6331f6f8a19f7ea03f
Version: 7badf4d6f49a358a01ab072bbff88d3ee886c33b
Version: 9856c0de49052174ab474113f4ba40c02aaee086
Version: 7aecdd47910c51707696e8b0e045b9f88bd4230f
Version: d51d2eeae4ce54d542909c4d9d07bf371a78592c
Version: 4203722d51afe3d239e03f15cc73efdf023a7103
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   Linux Linux Version: 6.5
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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",
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            }
          ]
        },
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          "product": "Linux",
          "programFiles": [
            "drivers/pci/pcie/aspm.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "6.5"
            },
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              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
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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: Fix link state exit during switch upstream function removal\n\nBefore 456d8aa37d0f (\"PCI/ASPM: Disable ASPM on MFD function removal to\navoid use-after-free\"), we would free the ASPM link only after the last\nfunction on the bus pertaining to the given link was removed.\n\nThat was too late. If function 0 is removed before sibling function,\nlink-\u003edownstream would point to free\u0027d memory after.\n\nAfter above change, we freed the ASPM parent link state upon any function\nremoval on the bus pertaining to a given link.\n\nThat is too early. If the link is to a PCIe switch with MFD on the upstream\nport, then removing functions other than 0 first would free a link which\nstill remains parent_link to the remaining downstream ports.\n\nThe resulting GPFs are especially frequent during hot-unplug, because\npciehp removes devices on the link bus in reverse order.\n\nOn that switch, function 0 is the virtual P2P bridge to the internal bus.\nFree exactly when function 0 is removed -- before the parent link is\nobsolete, but after all subordinate links are gone.\n\n[kwilczynski: commit log]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:16:33.817Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cbf937dcadfd571a434f8074d057b32cd14fbea5"
        }
      ],
      "title": "PCI/ASPM: Fix link state exit during switch upstream function removal",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-58093",
    "datePublished": "2025-04-16T14:11:42.682Z",
    "dateReserved": "2025-03-06T15:52:09.188Z",
    "dateUpdated": "2025-05-26T05:16:33.817Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-58093\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-16T15:15:53.220\",\"lastModified\":\"2025-04-17T20:22:16.240\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nPCI/ASPM: Fix link state exit during switch upstream function removal\\n\\nBefore 456d8aa37d0f (\\\"PCI/ASPM: Disable ASPM on MFD function removal to\\navoid use-after-free\\\"), we would free the ASPM link only after the last\\nfunction on the bus pertaining to the given link was removed.\\n\\nThat was too late. If function 0 is removed before sibling function,\\nlink-\u003edownstream would point to free\u0027d memory after.\\n\\nAfter above change, we freed the ASPM parent link state upon any function\\nremoval on the bus pertaining to a given link.\\n\\nThat is too early. If the link is to a PCIe switch with MFD on the upstream\\nport, then removing functions other than 0 first would free a link which\\nstill remains parent_link to the remaining downstream ports.\\n\\nThe resulting GPFs are especially frequent during hot-unplug, because\\npciehp removes devices on the link bus in reverse order.\\n\\nOn that switch, function 0 is the virtual P2P bridge to the internal bus.\\nFree exactly when function 0 is removed -- before the parent link is\\nobsolete, but after all subordinate links are gone.\\n\\n[kwilczynski: commit log]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/cbf937dcadfd571a434f8074d057b32cd14fbea5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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