CVE-2016-7466
First published: Tue Sep 20 2016(Updated: )
Memory leak in the usb_xhci_exit function in hw/usb/hcd-xhci.c in QEMU (aka Quick Emulator), when the xhci uses msix, allows local guest OS administrators to cause a denial of service (memory consumption and possibly QEMU process crash) by repeatedly unplugging a USB device.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU | <=2.7.1 | |
| SUSE Linux | =42.2 | |
| Red Hat OpenStack for IBM Power | =6.0 | |
| Red Hat OpenStack for IBM Power | =7.0 | |
| Red Hat OpenStack for IBM Power | =8 | |
| Red Hat OpenStack for IBM Power | =9 | |
| Red Hat OpenStack for IBM Power | =10 | |
| Red Hat OpenStack for IBM Power | =11 | |
| Red Hat Enterprise Virtualization | =4.0 | |
| Red Hat Enterprise Linux | =7.0 |
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Reference Links
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=b53dd4495ced2432a0b652ea895e651d07336f7e
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
- http://www.openwall.com/lists/oss-security/2016/09/19/8
- http://www.openwall.com/lists/oss-security/2016/09/20/3
- http://www.securityfocus.com/bid/93029
- https://access.redhat.com/errata/RHSA-2017:2392
- https://access.redhat.com/errata/RHSA-2017:2408
- https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg02773.html
- https://security.gentoo.org/glsa/201611-11
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1377838
- https://bugzilla.redhat.com/show_bug.cgi?id=1377837
Frequently Asked Questions
What is the severity of CVE-2016-7466?
CVE-2016-7466 is considered a high severity vulnerability that can cause denial of service due to memory leak.
How do I fix CVE-2016-7466?
To fix CVE-2016-7466, upgrade to a version of QEMU later than 2.7.1 that addresses this memory leak issue.
Which software is affected by CVE-2016-7466?
CVE-2016-7466 affects QEMU versions up to 2.7.1, as well as various versions of Red Hat OpenStack and openSUSE Leap 42.2.
What type of attack can be performed using CVE-2016-7466?
An attacker can exploit CVE-2016-7466 by repeatedly unplugging a USB device, leading to memory consumption and potential crash of the QEMU process.
Is CVE-2016-7466 a remote attack vector?
CVE-2016-7466 requires local access by guest OS administrators, making it a local privilege escalation vulnerability.
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