Vulnerability Description
The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | <= 2.7.1 |
| Opensuse | Leap | 42.2 |
| Redhat | Openstack | 6.0 |
| Redhat | Virtualization | 4.0 |
| Redhat | Enterprise Linux | 7.0 |
Related Weaknesses (CWE)
References
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=973e7170dddefb491a48df5cba33b2ae1
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.htmlMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/16/10Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/16/4Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/92996Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:2392Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2408Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.htmlPatchThird Party Advisory
- https://security.gentoo.org/glsa/201609-01Third Party Advisory
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=973e7170dddefb491a48df5cba33b2ae1
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.htmlMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/16/10Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/16/4Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/92996Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:2392Third Party Advisory
FAQ
What is CVE-2016-7422?
CVE-2016-7422 is a vulnerability with a CVSS score of 6.0 (MEDIUM). The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) v...
How severe is CVE-2016-7422?
CVE-2016-7422 has been rated MEDIUM with a CVSS base score of 6.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-7422?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Opensuse Leap, Redhat Openstack, Redhat Virtualization, Redhat Enterprise Linux.