CVE-2025-39823

HIGH

Linux Kernel 4.19-6.16.5 - KVM x86 Guest-Controlled Indices Array Index Validation Issue

Title source: llm
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: use array_index_nospec with indices that come from guest min and dest_id are guest-controlled indices. Using array_index_nospec() after the bounds checks clamps these values to mitigate speculative execution side-channels.

References (11)

Core 11
Core References

Scores

CVSS v3 7.8
EPSS 0.0016
EPSS Percentile 6.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-129
Status published
Products (28)
debian/debian_linux 11.0
linux/Kernel 4.19.0 - 5.4.298linux
linux/Kernel 5.11.0 - 5.15.191linux
linux/Kernel 5.16.0 - 6.1.150linux
linux/Kernel 5.5.0 - 5.10.242linux
linux/Kernel 6.13.0 - 6.16.5linux
linux/Kernel 6.2.0 - 6.6.104linux
linux/Kernel 6.7.0 - 6.12.45linux
Linux/Linux < 4.19
Linux/Linux 4.19
... and 18 more
Published Sep 16, 2025
Tracked Since Feb 18, 2026