CVE-2025-39699

In the Linux kernel, the following vulnerability has been resolved: iommu/riscv: prevent NULL deref in iova_to_phys The riscv_iommu_pte_fetch() function returns either NULL for unmapped/never-mapped iova, or a valid leaf pte pointer that requires no further validation. riscv_iommu_iova_to_phys() failed to handle NULL returns. Prevent null pointer dereference in riscv_iommu_iova_to_phys(), and remove the pte validation.

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/220c491490255b656672bb572b18460cd9155926	Patch
https://git.kernel.org/stable/c/99d4d1a070870aa08163af8ce0522992b7f35d8c	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc2::::::

History

19 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: iommu/riscv: evitar desreferencia NULL en iova_to_phys La función riscv_iommu_pte_fetch() devuelve NULL para iova no mapeada/nunca mapeada, o un puntero pte de hoja válido que no requiere validación adicional. riscv_iommu_iova_to_phys() no pudo manejar los retornos NULL. Evitar la desreferencia de puntero nulo en riscv_iommu_iova_to_phys(), y eliminar la validación de pte.

Information

Published : 2025-09-05 18:15

Updated : 2026-10-19 21:10

NVD link : CVE-2025-39699

Mitre link : CVE-2025-39699

CVE.ORG link : CVE-2025-39699

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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