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Date: Mon, 26 Nov 2018 11:19:29 +0530 (IST)
From: P J P <>
To: oss security list <>
cc: Greg Kurz <>, zhibin hu <>
Subject: CVE-2018-19489 QEMU: 9pfs: crash due to race condition in renaming


A use-after-free flaw was found in the VirtFS, host directory sharing via Plan 
9 File System(9pfs) support in QEMU. It could occur due to a race condition 
while renaming files on a shared host directory.

A user inside guest could use this flaw to crash the QEMU process resulting in 
DoS issue.

Upstream patch:

This issue was reported by Zhibin Hu.

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

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