CVE-2016-1922

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.06%
Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory debian.org Vendor Advisory debian.org Vendor Advisory gnu.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2016/01/16/1 third party advisory mailing list
https://security.gentoo.org/glsa/201604-01 third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2016/01/16/6 third party advisory mailing list
http://www.debian.org/security/2016/dsa-3469 third party advisory vendor advisory
http://www.debian.org/security/2016/dsa-3470 third party advisory vendor advisory
http://www.debian.org/security/2016/dsa-3471 third party advisory vendor advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html mailing list patch vendor advisory
http://www.securityfocus.com/bid/81058 vdb entry third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1283934 issue tracking third party advisory

Frequently Asked Questions

What is the severity of CVE-2016-1922?
CVE-2016-1922 has been scored as a medium severity vulnerability.
How to fix CVE-2016-1922?
To fix CVE-2016-1922, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-1922 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-1922 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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