CVE-2024-43824

{
  "id": "CVE-2024-43824",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-08-17T10:15:08.477",
  "lastModified": "2026-10-30T13:17:33.460",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: pci-epf-test: Make use of cached 'epc_features' in pci_epf_test_core_init()\n\nInstead of getting the epc_features from pci_epc_get_features() API, use\nthe cached pci_epf_test::epc_features value to avoid the NULL check. Since\nthe NULL check is already performed in pci_epf_test_bind(), having one more\ncheck in pci_epf_test_core_init() is redundant and it is not possible to\nhit the NULL pointer dereference.\n\nAlso with commit a01e7214bef9 (\"PCI: endpoint: Remove \"core_init_notifier\"\nflag\"), 'epc_features' got dereferenced without the NULL check, leading to\nthe following false positive Smatch warning:\n\n  drivers/pci/endpoint/functions/pci-epf-test.c:784 pci_epf_test_core_init() error: we previously assumed 'epc_features' could be null (see line 747)\n\nThus, remove the redundant NULL check and also use the epc_features::\n{msix_capable/msi_capable} flags directly to avoid local variables.\n\n[kwilczynski: commit log]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: endpoint: pci-epf-test: utilice 'epc_features' en caché en pci_epf_test_core_init() En lugar de obtener epc_features de la API pci_epc_get_features(), utilice pci_epf_test en caché:: Valor epc_features para evitar la verificación NULL. Dado que la verificación NULL ya se realiza en pci_epf_test_bind(), tener una verificación más en pci_epf_test_core_init() es redundante y no es posible alcanzar la desreferencia del puntero NULL. Además, con el commit a01e7214bef9 (\"PCI: endpoint: Remove \"core_init_notifier\" flag\"), se eliminó la referencia a 'epc_features' sin la verificación NULL, lo que generó la siguiente advertencia de falso positivo Smatch: drivers/pci/endpoint/functions/pci-epf-test .c:784 Error de pci_epf_test_core_init(): anteriormente asumimos que 'epc_features' podría ser nulo (consulte la línea 747). Por lo tanto, elimine la verificación NULL redundante y también use los indicadores epc_features:: {msix_capable/msi_capable} directamente para evitar variables locales. [kwilczynski: registro de confirmación]"
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/pci/endpoint/functions/pci-epf-test.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5e50ee27d4a52a817ab152128c48690ec7c5cdf1",
              "lessThan": "5c71be3476088ab490d48a468b54d791f91241b8",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5e50ee27d4a52a817ab152128c48690ec7c5cdf1",
              "lessThan": "97cee643a825808711cc78475fd61a30824b7a0f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5e50ee27d4a52a817ab152128c48690ec7c5cdf1",
              "lessThan": "af4ad016abb1632ff7ee598a6037952b495e5b80",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5e50ee27d4a52a817ab152128c48690ec7c5cdf1",
              "lessThan": "5a5095a8bd1bd349cce1c879e5e44407a34dda8a",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/pci/endpoint/functions/pci-epf-test.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.7",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.7",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.10.3",
              "lessThanOrEqual": "6.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.11",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2024-09-10T16:08:51.186456Z",
          "id": "CVE-2024-43824",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "5.7",
              "versionEndExcluding": "6.10.3",
              "matchCriteriaId": "BDEF183E-5F26-49C1-B426-CB56F8FC5A31"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/5a5095a8bd1bd349cce1c879e5e44407a34dda8a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    {
      "url": "https://git.kernel.org/stable/c/5c71be3476088ab490d48a468b54d791f91241b8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/97cee643a825808711cc78475fd61a30824b7a0f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/af4ad016abb1632ff7ee598a6037952b495e5b80",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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}