Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Mon, 18 Apr 2016 17:44:21 +0530 (IST)
From: P J P <>
To: oss security list <>
Subject: Qemu: usb: Infinite loop vulnerability in usb_ehci using siTD


Qemu emulator built with the USB EHCI emulation support is vulnerable to an 
infinite loop issue. It occurs during communication between host controller 
interface(EHCI) and a respective device driver. These two communicate via a 
split isochronous transfer descriptor list(siTD) and an infinite loop unfolds 
if there is a closed loop in this list.

A privileges used inside guest could use this flaw to consume excessive CPU 
cycles & resources on the host.

This issue is similar to CVE-2015-8558, but using siTD instead of iTD.

Upstream patch:


This issue are discovered by Du Shaobo of Qihoo 360 Inc.

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

Powered by blists - more mailing lists

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.