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 products
linux: linux kernel; debian: debian linux
References10
- git.kernel.org/stable/c/31a0ad2f60cb4816e06218b63e695eb72ce74974 Patch
- git.kernel.org/stable/c/33e974c2d5a82b2f9d9ba0ad9cbaabc1c8e3985f Patch
- git.kernel.org/stable/c/67a05679621b7f721bdba37a5d18665d3aceb695 Patch
- git.kernel.org/stable/c/72777fc31aa7ab2ce00f44bfa3929c6eabbeaf48 Patch
- git.kernel.org/stable/c/c87bd4dd43a624109c3cc42d843138378a7f4548 Patch
- git.kernel.org/stable/c/d51e381beed5e2f50f85f49f6c90e023754efa12 Patch
- git.kernel.org/stable/c/f49161646e03d107ce81a99c6ca5da682fe5fb69 Patch
- git.kernel.org/stable/c/f57a4bd8d6cb5af05b8ac1be9098e249034639fb Patch
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html Mailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 8 · as of 8 November 2026
- CWE
- CWE-129
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.