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High severity7.8NVD Advisory· Published Sep 16, 2025· Updated Jul 30, 2026

CVE-2025-39815

CVE-2025-39815

Description

In the Linux kernel, the following vulnerability has been resolved:

RISC-V: KVM: fix stack overrun when loading vlenb

The userspace load can put up to 2048 bits into an xlen bit stack buffer. We want only xlen bits, so check the size beforehand.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

7

Linux/Kernel6 versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 5 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=6.8,<6.12.45
- cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*
- (no CPE)
- (no CPE)range: 6.8
osv-coords
pkg:linux/kernel
Range: >= 6.8.0, < 6.12.45

Patches

Vulnerability mechanics

References

3

News mentions

0

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