CVE-2012-1179: The Linux kernel before 3.3.1, when KVM is used, allows guest OS users to cause a denial of service (host O...

Security readout for executives and security teams

This is a Linux KVM denial-of-service issue. A user with administrative access inside a guest VM could trigger a host kernel crash on affected Linux kernels before 3.3.1. The business impact is service interruption on virtualization hosts, not documented data theft or remote takeover. Exposure is mainly Linux virtualization hosts running KVM on kernels before 3.3.1, including vendor kernels before their backported fixes. Risk is higher where guest administrators are untrusted tenants or separately managed teams. Treat as a scheduled but important infrastructure reliability fix. Escalate priority for shared or multi-tenant KVM platforms because one guest administrator could disrupt the host and other workloads. Mitigation focus: Upgrade affected Linux kernels to 3.3.1 or later.; Apply vendor backported kernel updates from Red Hat, SUSE, Fedora, or relevant distributors.; Prioritize KVM hosts running untrusted or externally administered guest VMs..

Prepared

Jun 24, 2026, 12:52 UTC (UTC+00:00)

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