CVE-2016-1922

MEDIUM

QEMU < 2.5.1.1 - Denial of Service via TPR Optimization Null Pointer Dereference

Title source: llm
STIX 2.1

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.

References (9)

Core 9
Core References
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2016/01/16/6
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2016/dsa-3469
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2016/dsa-3470
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2016/dsa-3471
Patch, Vendor Advisory mailing-list x_refsource_mlist
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/81058
Issue Tracking, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=1283934
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2016/01/16/1
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201604-01

Scores

CVSS v3 5.5
EPSS 0.0008
EPSS Percentile 23.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (3)
debian/debian_linux 7.0
debian/debian_linux 8.0
qemu/qemu < 2.5.1.1
Published Dec 29, 2016
Tracked Since Feb 18, 2026