CVE-2017-7471: Qemu

Critical severity, CVSS 9.0. EPSS: 0.9% chance of exploitation in the next 30 days.

Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing files on a shared host directory. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.

Affected products

• Qemu Qemu: up to and including 2.8.1.1; version 2.9.0 only

Published 2018-07-09. Last modified 2026-06-17.