{
  "id": "CVE-2024-43824",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-08-17T10:15:08.477",
  "lastModified": "2024-09-03T17:48:39.160",
  "vulnStatus": "Analyzed",
  "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 cach\u00e9 en pci_epf_test_core_init() En lugar de obtener epc_features de la API pci_epc_get_features(), utilice pci_epf_test en cach\u00e9:: Valor epc_features para evitar la verificaci\u00f3n NULL. Dado que la verificaci\u00f3n NULL ya se realiza en pci_epf_test_bind(), tener una verificaci\u00f3n m\u00e1s en pci_epf_test_core_init() es redundante y no es posible alcanzar la desreferencia del puntero NULL. Adem\u00e1s, con el commit a01e7214bef9 (\"PCI: endpoint: Remove \"core_init_notifier\" flag\"), se elimin\u00f3 la referencia a 'epc_features' sin la verificaci\u00f3n NULL, lo que gener\u00f3 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' podr\u00eda ser nulo (consulte la l\u00ednea 747). Por lo tanto, elimine la verificaci\u00f3n NULL redundante y tambi\u00e9n use los indicadores epc_features:: {msix_capable/msi_capable} directamente para evitar variables locales. [kwilczynski: registro de confirmaci\u00f3n]"
    }
  ],
  "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: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
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "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"
            }
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  "references": [
    {
      "url": "https://git.kernel.org/stable/c/5a5095a8bd1bd349cce1c879e5e44407a34dda8a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://git.kernel.org/stable/c/af4ad016abb1632ff7ee598a6037952b495e5b80",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    }
  ]
}