CVE-2012-0045: Linux Kernel

Medium severity, CVSS 4.7. EPSS: 1% chance of exploitation in the next 30 days.

The em_syscall function in arch/x86/kvm/emulate.c in the KVM implementation in the Linux kernel before 3.2.14 does not properly handle the 0f05 (aka syscall) opcode, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application, as demonstrated by an NASM file.

Affected products

• Linux Linux Kernel: up to and including 3.2.13; version 3.0 only; version 3.0.1 only; version 3.0.2 only; version 3.0.3 only; version 3.0.4 only; …

Published 2012-07-03. Last modified 2026-06-16.