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Date: Tue, 16 Feb 2016 17:06:13 +0530 (IST)
From: P J P <>
To: oss security list <>
cc: Zuozhi Fzz <>
Subject: CVE request Qemu: usb: multiple eof_timers in ohci leads to null
 pointer dereference


Qemu emulator built with the USB OHCI emulation support is vulnerable to a 
null pointer dereference issue. It could occur when OHCI transitions to a 
OHCI_USB_OPERATIONAL state, leading to creation of multiple eof timers. A 
privileged user inside guest could use this flaw to crash the Qemu process on 
the host, resulting in DoS.

Upstream patch:


This issue was discovered by Zuozhi Fzz of Alibaba 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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