CVE-2025-39815

MEDIUM 5.5

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

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Sep 16, 2025
Last Updated	May 11, 2026

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Affected Versions

Linux / Linux

2fa290372dfe7dd248b1c16f943f273a3e674f22 < c76bf8359188a11f8fd790e5bbd6077894a245cc 2fa290372dfe7dd248b1c16f943f273a3e674f22 < 6d28659b692a0212f360f8bd8a58712b339f9aac 2fa290372dfe7dd248b1c16f943f273a3e674f22 < 799766208f09f95677a9ab111b93872d414fbad7

Linux / Linux

6.8

References

NVD ↗ CVE.org ↗ EPSS Data ↗

git.kernel.org: https://git.kernel.org/stable/c/c76bf8359188a11f8fd790e5bbd6077894a245cc git.kernel.org: https://git.kernel.org/stable/c/6d28659b692a0212f360f8bd8a58712b339f9aac git.kernel.org: https://git.kernel.org/stable/c/799766208f09f95677a9ab111b93872d414fbad7