CVE-2025-39823

HIGH

MEDIUM Priority: 0.01 BB Relevance: 41/100

Published: 2025-09-16 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local

AC: Low

PR: Low

UI: None

S: Unchanged

C: High

I: High

A: High

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.

Weakness Classification (1)

CWE-129

Affected Software (14)

Vendor	Product	Version
Linux	Linux	4180bf1b655a791a0a6ef93a2ffffc762722c782 < 72777fc31aa7ab2ce00f44bfa3929c6eabbeaf48
Linux	Linux	4180bf1b655a791a0a6ef93a2ffffc762722c782 < 31a0ad2f60cb4816e06218b63e695eb72ce74974
Linux	Linux	4180bf1b655a791a0a6ef93a2ffffc762722c782 < d51e381beed5e2f50f85f49f6c90e023754efa12
Linux	Linux	4180bf1b655a791a0a6ef93a2ffffc762722c782 < 33e974c2d5a82b2f9d9ba0ad9cbaabc1c8e3985f
Linux	Linux	4180bf1b655a791a0a6ef93a2ffffc762722c782 < f49161646e03d107ce81a99c6ca5da682fe5fb69
Linux	Linux	4180bf1b655a791a0a6ef93a2ffffc762722c782 < 67a05679621b7f721bdba37a5d18665d3aceb695
Linux	Linux	4180bf1b655a791a0a6ef93a2ffffc762722c782 < f57a4bd8d6cb5af05b8ac1be9098e249034639fb
Linux	Linux	4180bf1b655a791a0a6ef93a2ffffc762722c782 < c87bd4dd43a624109c3cc42d843138378a7f4548
Linux	Linux	4.19
debian	debian_linux	11.0
linux	linux_kernel	4.19 – 5.4.298
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17