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Date: Wed, 17 May 2017 16:27:01 +0530 (IST)
From: P J P <>
To: oss security list <>
cc: Leo Gaspard <>
Subject: CVE-2017-7493 Qemu: 9pfs: guest privilege escalation in virtfs
 mapped-file mode


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 virtfs metadata files in mapped-file security 

A guest user could use this flaw to escalate their privileges inside guest.

Upstream patch:


'CVE-2017-7493' has been assigned to this issue by Red Hat Inc.

It was reported by Leo Gaspard.

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

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