CVE-2011-2527: The change_process_uid function in os-posix.c in Qemu 0.14.0 and earlier does not properly drop group privi...

Security readout for executives and security teams

Older QEMU versions could fail to fully drop group privileges when started with the -runas option. A user inside a guest may be able to access files on the host that should be restricted. This is most concerning on shared or multi-tenant virtualization hosts running legacy QEMU. Exposure is likely limited to legacy QEMU deployments, especially hosts running QEMU 0.14.0 or earlier with -runas configured. Modern packaged distributions may already include vendor fixes, but the source bundle does not provide a complete affected CPE list. Prioritize this for legacy virtualization infrastructure, not general desktops. The business risk is unauthorized host file access from guest users, which matters most where untrusted users or tenants can run workloads on shared QEMU hosts. Mitigation focus: Upgrade QEMU using the relevant vendor advisory or supported distribution package.; Identify and prioritize hosts running QEMU 0.14.0 or earlier.; Review whether QEMU is launched with the -runas option..

Prepared

Jun 24, 2026, 12:34 UTC (UTC+00:00)

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