CVE-2025-39699iommu/riscv: prevent NULL deref in iova_to_phys
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- May 11, 2026
- First seen by InfoSec Signals
- Oct 19, 2026
Affected products
Linux Linux linux:linux (from the name) | 488ffbf181718b9ad8c1838cb249d60973e78eda builds before 220c491490255b656672bb572b18460cd9155926; 488ffbf181718b9ad8c1838cb249d60973e78eda builds before 99d4d1a070870aa08163af8ce0522992b7f35d8c | CNA record |
linux linux_kernel linux:linux_kernel | from 6.13 before 6.16.4; 6.17; 6.17 | NVD |
References
- https://git.kernel.org/stable/c/220c491490255b656672bb572b18460cd9155926patch
- https://git.kernel.org/stable/c/99d4d1a070870aa08163af8ce0522992b7f35d8cpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.