CVE-2024-43824

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]

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/5a5095a8bd1bd349cce1c879e5e44407a34dda8a	Patch
https://git.kernel.org/stable/c/5c71be3476088ab490d48a468b54d791f91241b8
https://git.kernel.org/stable/c/97cee643a825808711cc78475fd61a30824b7a0f
https://git.kernel.org/stable/c/af4ad016abb1632ff7ee598a6037952b495e5b80	Patch

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

History

30 Oct 2026, 13:17

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/5c71be3476088ab490d48a468b54d791f91241b8 -

21 Oct 2026, 13:17

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/97cee643a825808711cc78475fd61a30824b7a0f -

Information

Published : 2024-08-17 10:15

Updated : 2026-10-30 13:17

NVD link : CVE-2024-43824

Mitre link : CVE-2024-43824

CVE.ORG link : CVE-2024-43824

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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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]"}], "lastModified": "2026-10-30T13:17:33.460", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BDEF183E-5F26-49C1-B426-CB56F8FC5A31", "versionEndExcluding": "6.10.3", "versionStartIncluding": "5.7"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}