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Date: Wed, 19 Apr 2017 13:35:12 +0530 (IST)
From: P J P <>
To: oss security list <>
cc: Greg Kurz <>
Subject: CVE-2017-7471 Qemu: 9p: virtfs allows guest to change filesystem
 attributes on host


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 

Upstream patches:


'CVE-2017-7471' has been assigned to it by Red Hat Inc.

Thank you.
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

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