CVE-2016-1922

MEDIUM

QEMU - DoS

Title source: llm

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)

[Third Party Advisory] http://www.debian.org/security/2016/dsa-3469

[Third Party Advisory] http://www.debian.org/security/2016/dsa-3470

[Third Party Advisory] http://www.debian.org/security/2016/dsa-3471

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/01/16/1

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/01/16/6

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/81058

[Issue Tracking, Third Party Advisory] https://bugzilla.redhat.com/show_bug.cgi?id=1283934

[Patch, Vendor Advisory] https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html

[Third Party Advisory] https://security.gentoo.org/glsa/201604-01

Scores

CVSS v3 5.5

EPSS 0.0008

EPSS Percentile 24.0%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Classification

CWE

CWE-476

Status published

Affected Products (4)

qemu/qemu < 2.5.1.1

debian/debian_linux

debian/debian_linux

n/a/n/a

Timeline

Published Dec 29, 2016

Tracked Since Feb 18, 2026