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Bug 596738 (CVE-2016-7994) - <app-emulation/qemu-2.7.0-r5: multiple memory leak (CVE-2016-7994)
Summary: <app-emulation/qemu-2.7.0-r5: multiple memory leak (CVE-2016-7994)
Alias: CVE-2016-7994
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:
Reported: 2016-10-10 07:54 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 2016-10-10 07:54:42 UTC

Qemu emulator(Qemu) built with the USB EHCI emulation support is vulnerable
to a memory leakage flaw. It could occur while processing isochronous transfer
descriptors(iTD), with buffer page select(PG) index that falls beyond buffer
page array area.

A privileged user inside guest could use this flaw to leak Qemu memory bytes
leading to a DoS on the host.

Upstream fix:


Quick Emulator built with the Virtio GPU Device support is vulnerable to a
memory leakage issue. It could occur while processing virtio GPU command

A privileged user/process inside guest could use this flaw to exhaust host
memory resulting in DoS.

Upstream fix:

@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 2016-10-26 21:52:28 UTC
Stabilization on bug #598046

commit 5a981e9d23127c779dc8ecb1d05ef08fe4d3a011
Author: Matthias Maier <>
Date:   Wed Oct 26 16:47:50 2016 -0500

    app-emulation/qemu: multiple security fixes for 2.7.0-r5
      CVE-2016-7907, bug 596048
      CVE-2016-7908, bug 596048
      CVE-2016-7909, bug 596048
      CVE-2016-7994, bug 596738
      CVE-2016-7994, bug 596738
      CVE-2016-8576, bug 596752
      CVE-2016-8577, bug 596776
      CVE-2016-8578, bug 596774
      CVE-2016-8668, bug 597110
      CVE-2016-8669, bug 597108
      CVE-2016-8669, bug 597108
      CVE-2016-8909, bug 598044
      CVE-2016-8910, bug 598046
    Package-Manager: portage-2.3.0
Comment 2 Matthias Maier gentoo-dev 2016-10-27 13:23:06 UTC
2.7.0-r5 is stable, all vulnerable versions dropped.

Security, please vote.
Comment 3 GLSAMaker/CVETool Bot gentoo-dev 2016-11-18 23:12:46 UTC
This issue was resolved and addressed in
 GLSA 201611-11 at
by GLSA coordinator Aaron Bauman (b-man).