Vulnerability Description
QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | <= 2.5.1.1 |
| Debian | Debian Linux | 7.0 |
Related Weaknesses (CWE)
References
- http://www.debian.org/security/2016/dsa-3469Third Party Advisory
- http://www.debian.org/security/2016/dsa-3470Third Party Advisory
- http://www.debian.org/security/2016/dsa-3471Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/01/16/1Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/01/16/6Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/81058Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1283934Issue TrackingThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.htmlPatchVendor Advisory
- https://security.gentoo.org/glsa/201604-01Third Party Advisory
- http://www.debian.org/security/2016/dsa-3469Third Party Advisory
- http://www.debian.org/security/2016/dsa-3470Third Party Advisory
- http://www.debian.org/security/2016/dsa-3471Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/01/16/1Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/01/16/6Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/81058Third Party AdvisoryVDB Entry
FAQ
What is CVE-2016-1922?
CVE-2016-1922 is a vulnerability with a CVSS score of 5.5 (MEDIUM). QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp in...
How severe is CVE-2016-1922?
CVE-2016-1922 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-1922?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Debian Debian Linux.