CVE-2013-6376: The recalculate_apic_map function in arch/x86/kvm/lapic.c in the KVM subsystem in the Linux kernel through...

Security readout for executives and security teams

CVE-2013-6376 is a Linux KVM flaw where a guest operating system user could crash the host operating system. The business impact is availability: affected virtualization hosts could be taken down by activity from inside a VM. The source bundle does not show data theft, privilege escalation, or active exploitation. Exposure is most relevant to Linux systems using KVM virtualization, especially hosts running kernels through 3.12.5 or vendor kernels before the referenced Ubuntu and openSUSE advisories. Risk is higher where tenants or untrusted users can control guest operating systems. Prioritize remediation for virtualization infrastructure where guest users are not fully trusted. The likely business impact is service interruption from host crashes, which can affect many VMs at once. Systems not running KVM are not indicated as exposed by the provided sources. Mitigation focus: Apply vendor kernel updates referenced by Ubuntu or openSUSE advisories.; Use kernels containing the upstream Linux fix commit.; Prioritize multi-tenant or untrusted-guest KVM hosts first..

Prepared

Jun 14, 2026, 15:13 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.