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Bug 594520 (CVE-2016-7466) - <app-emulation/qemu-2.7.0-r4: usb: xhci memory leakage during device unplug (CVE-2016-7466)
Summary: <app-emulation/qemu-2.7.0-r4: usb: xhci memory leakage during device unplug (...
Alias: CVE-2016-7466
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B4 [glsa cve]
Depends on: CVE-2016-7423
  Show dependency tree
Reported: 2016-09-20 14:32 UTC by Agostino Sarubbo
Modified: 2016-11-18 23:12 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2016-09-20 14:32:04 UTC
From ${URL} :

Quick Emulator(Qemu) built with the USB xHCI controller emulation support is 
vulnerable to a memory leakage issue. It could occur while doing a USB device 
unplug operation; Doing so repeatedly would result in leaking host memory, 
affecting other services on the host.

A privileged user inside guest could use this flaw to cause a DoS on the host 
and/or potentially crash the Qemu process instance on the host.

Upstream patch:

@maintainer(s): after the bump, in case we need to stabilize the package, please let us know if it is ready for the stabilization or not.
Comment 1 Matthias Maier gentoo-dev 2016-09-27 02:18:15 UTC
Stabilization on #594368

commit 153ded7835ad0fbd8ec8a7552f90c973d1c2dd28
Author: Matthias Maier <>
Date:   Mon Sep 26 21:01:29 2016 -0500

    app-emulation/qemu: security fixes, bug #594520, bug #594368
      CVE-2016-7466.patch # bug 594520
      CVE-2016-7423.patch # bug 594368
Comment 2 GLSAMaker/CVETool Bot gentoo-dev 2016-11-18 23:12:23 UTC
This issue was resolved and addressed in
 GLSA 201611-11 at
by GLSA coordinator Aaron Bauman (b-man).