CVE-2025-39823
HIGH severity · CVSS 7.8 · CWE-129
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/31a0ad2f60cb4816e06218b63e695eb72ce74974 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/31a0ad2f60cb4816e06218b63e695eb72ce74974Patch
- https://git.kernel.org/stable/c/33e974c2d5a82b2f9d9ba0ad9cbaabc1c8e3985fPatch
- https://git.kernel.org/stable/c/67a05679621b7f721bdba37a5d18665d3aceb695Patch
- https://git.kernel.org/stable/c/72777fc31aa7ab2ce00f44bfa3929c6eabbeaf48Patch
- https://git.kernel.org/stable/c/c87bd4dd43a624109c3cc42d843138378a7f4548Patch
- https://git.kernel.org/stable/c/d51e381beed5e2f50f85f49f6c90e023754efa12Patch
- https://git.kernel.org/stable/c/f49161646e03d107ce81a99c6ca5da682fe5fb69Patch
- https://git.kernel.org/stable/c/f57a4bd8d6cb5af05b8ac1be9098e249034639fbPatch