CVE-2025-38069

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  2. Vulnerabilities (CVE)
  3. CVE-2025-38069

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

I

n the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-test: Fix double free that causes kernel to oops Fix a kernel oops found while testing the stm32_pcie Endpoint driver with handling of PERST# deassertion: During EP initialization, pci_epf_test_alloc_space() allocates all BARs, which are further freed if epc_set_bar() fails (for instance, due to no free inbound window). However, when pci_epc_set_bar() fails, the error path: pci_epc_set_bar() -> pci_epf_free_space() does not clear the previous assignment to epf_test->reg[bar]. Then, if the host reboots, the PERST# deassertion restarts the BAR allocation sequence with the same allocation failure (no free inbound window), creating a double free situation since epf_test->reg[bar] was deallocated and is still non-NULL. Thus, make sure that pci_epf_alloc_space() and pci_epf_free_space() invocations are symmetric, and as such, set epf_test->reg[bar] to NULL when memory is freed. [kwilczynski: commit log]

References
Link Resource
https://git.kernel.org/stable/c/8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee Patch
https://git.kernel.org/stable/c/934e9d137d937706004c325fa1474f9e3f1ba10a Patch
https://git.kernel.org/stable/c/fe2329eff5bee461ebcafadb6ca1df0cbf5945fd Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

14 Nov 2025, 17:05

Type Values Removed Values Added
CWE CWE-415
References () https://git.kernel.org/stable/c/8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee - () https://git.kernel.org/stable/c/8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee - Patch
References () https://git.kernel.org/stable/c/934e9d137d937706004c325fa1474f9e3f1ba10a - () https://git.kernel.org/stable/c/934e9d137d937706004c325fa1474f9e3f1ba10a - Patch
References () https://git.kernel.org/stable/c/fe2329eff5bee461ebcafadb6ca1df0cbf5945fd - () https://git.kernel.org/stable/c/fe2329eff5bee461ebcafadb6ca1df0cbf5945fd - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: endpoint: pci-epf-test: Se corrige la doble liberación que provoca un error en el kernel. Se corrige un error en el kernel detectado al probar el controlador de endpoint stm32_pcie con el manejo de la deaserción PERST#: Durante la inicialización de EP, pci_epf_test_alloc_space() asigna todos los BAR, que se liberan aún más si epc_set_bar() falla (por ejemplo, debido a que no hay una ventana de entrada libre). Sin embargo, cuando pci_epc_set_bar() falla, la ruta de error: pci_epc_set_bar() -> pci_epf_free_space() no borra la asignación previa a epf_test->reg[bar]. Luego, si el host se reinicia, la desasignación PERST# reinicia la secuencia de asignación de BAR con el mismo fallo de asignación (sin ventana de entrada libre), lo que crea una situación de doble liberación, ya que epf_test->reg[bar] se desasignó y sigue siendo distinto de NULL. Por lo tanto, asegúrese de que las invocaciones de pci_epf_alloc_space() y pci_epf_free_space() sean simétricas y, por lo tanto, establezca epf_test->reg[bar] en NULL cuando se libere memoria. [kwilczynski: registro de confirmaciones]

18 Jun 2025, 10:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-18 10:15

Updated : 2025-11-14 17:05

NVD link : CVE-2025-38069

Mitre link : CVE-2025-38069

CVE.ORG link : CVE-2025-38069

JSON object : View

Products Affected

linux

CWE
CWE-415

Double Free