CVE-2017-7471: Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support,...

Security readout for executives and security teams

CVE-2017-7471 affects QEMU deployments that expose host directories to guests through VirtFS/9pfs. A privileged user inside a guest may be able to reach outside the intended shared folder and affect the host filesystem, creating a possible host privilege escalation path. Exposure is likely limited to virtualization hosts running QEMU with VirtFS/9pfs host directory sharing enabled. Systems without VirtFS/9pfs sharing are not indicated as affected by the supplied sources. Prioritize remediation on QEMU virtualization hosts using VirtFS/9pfs sharing, especially multi-tenant or less-trusted guest environments. Systems not using this feature are lower priority based on the provided evidence. Mitigation focus: Apply vendor QEMU updates that include the upstream VirtFS/9pfs fix.; Check Gentoo, Red Hat, or platform vendor guidance for exact fixed packages.; Disable unnecessary VirtFS/9pfs host directory sharing..

Prepared

Jun 7, 2026, 13:02 UTC (UTC+00:00)

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