CVE-2025-39699

MEDIUM EPSS 2.8%
Published Sep 5, 20259mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 5, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥6.13  –  <6.16.4
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any

References 2

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

Remediation

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