CVE-2025-39699
Medium
Description
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedSep 5, 2025
First seenSep 5, 2025
How to fix
Update
- linux linux_kernel6.16.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.13 ≤ v < 6.16.4, 6.17 | 6.16.4 |
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