CVE-2025-39823 : faille élevée linux linux kernel (CVSS 7.8)

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.

Sévérité

Élevée (CVSS 7.8)

Vecteur CVSS

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation active

Non signalée par la CISA

Publication

16 sept. 2025

Dernière mise à jour

17 juin 2026

• linux linux kernel
• debian debian linux

• Fiche CVE-2025-39823 sur le NVD (NIST)
• git.kernel.org/stable/c/31a0ad2f60cb4816e06218b63e695eb72ce74…
• git.kernel.org/stable/c/33e974c2d5a82b2f9d9ba0ad9cbaabc1c8e39…
• git.kernel.org/stable/c/67a05679621b7f721bdba37a5d18665d3aceb…
• git.kernel.org/stable/c/72777fc31aa7ab2ce00f44bfa3929c6eabbea…
• git.kernel.org/stable/c/c87bd4dd43a624109c3cc42d843138378a7f4…
• git.kernel.org/stable/c/d51e381beed5e2f50f85f49f6c90e023754ef…
• git.kernel.org/stable/c/f49161646e03d107ce81a99c6ca5da682fe5f…
• git.kernel.org/stable/c/f57a4bd8d6cb5af05b8ac1be9098e24903463…
• lists.debian.org/debian-lts-announce/2025/10/msg00007.html
• lists.debian.org/debian-lts-announce/2025/10/msg00008.html
• cert-portal.siemens.com/productcert/html/ssa-032379.html