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CVE-2025-39823

nvd nist
Published: Sep 16, 2025Modified: Jun 17, 2026

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7.8
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability: 1.8 / Impact: 5.9
Source: NVD

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.

Affected (11)

Linux
1 product
Linux Kernel
Debian
1 product
Debian Linux
Configuration A
10 vulnerable
Vulnerable SoftwareAffected Versions
Linux
Linux Kernel
From 4.19 to 5.4.298
Linux Kernel
From 5.11 to 5.15.191
Linux Kernel
From 5.16 to 6.1.150
Linux Kernel
From 5.5 to 5.10.242
Linux Kernel
From 6.13 to 6.16.5
Linux Kernel
From 6.2 to 6.6.104
Linux Kernel
From 6.7 to 6.12.45
Linux Kernel
Version 6.17 rc1
Linux Kernel
Version 6.17 rc2
Linux Kernel
Version 6.17 rc3
Configuration B
1 vulnerable
Vulnerable SoftwareAffected Versions
Debian Linux
Version 11.0

Related CWEs

CWE-129
Improper Validation of Array Index
The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

References (11)

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

Timeline

No history available yet.