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CVE-2024-43824 (GCVE-0-2024-43824)

Vulnerability from cvelistv5 – Published: 2024-08-17 09:21 – Updated: 2026-05-11 20:30
VLAI
Title
PCI: endpoint: pci-epf-test: Make use of cached 'epc_features' in pci_epf_test_core_init()
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-test: Make use of cached 'epc_features' in pci_epf_test_core_init() Instead of getting the epc_features from pci_epc_get_features() API, use the cached pci_epf_test::epc_features value to avoid the NULL check. Since the NULL check is already performed in pci_epf_test_bind(), having one more check in pci_epf_test_core_init() is redundant and it is not possible to hit the NULL pointer dereference. Also with commit a01e7214bef9 ("PCI: endpoint: Remove "core_init_notifier" flag"), 'epc_features' got dereferenced without the NULL check, leading to the following false positive Smatch warning: 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) Thus, remove the redundant NULL check and also use the epc_features:: {msix_capable/msi_capable} flags directly to avoid local variables. [kwilczynski: commit log]
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:08 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5e50ee27d4a52a817ab152128c48690ec7c5cdf1 , < af4ad016abb1632ff7ee598a6037952b495e5b80 (git)
Affected: 5e50ee27d4a52a817ab152128c48690ec7c5cdf1 , < 5a5095a8bd1bd349cce1c879e5e44407a34dda8a (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.10.3 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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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 \u0027epc_features\u0027 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 \u0027epc_features\u0027 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. 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    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-43824\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:08:51.186456Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:23.218Z\"}}], \"cna\": {\"title\": \"PCI: endpoint: pci-epf-test: Make use of cached \u0027epc_features\u0027 in pci_epf_test_core_init()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5e50ee27d4a52a817ab152128c48690ec7c5cdf1\", \"lessThan\": \"af4ad016abb1632ff7ee598a6037952b495e5b80\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e50ee27d4a52a817ab152128c48690ec7c5cdf1\", \"lessThan\": \"5a5095a8bd1bd349cce1c879e5e44407a34dda8a\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/pci/endpoint/functions/pci-epf-test.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.7\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.7\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.10.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/pci/endpoint/functions/pci-epf-test.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/af4ad016abb1632ff7ee598a6037952b495e5b80\"}, {\"url\": \"https://git.kernel.org/stable/c/5a5095a8bd1bd349cce1c879e5e44407a34dda8a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nPCI: endpoint: pci-epf-test: Make use of cached \u0027epc_features\u0027 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\\\"), \u0027epc_features\u0027 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 \u0027epc_features\u0027 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]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.3\", \"versionStartIncluding\": \"5.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11\", \"versionStartIncluding\": \"5.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:30:29.868Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-43824\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:30:29.868Z\", \"dateReserved\": \"2024-08-17T09:11:59.272Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-08-17T09:21:44.483Z\", \"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

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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.