CVE-2016-6833

MEDIUM

Qemu < 2.6.2 - Use After Free

Title source: rule

Description

Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU instance crash) by leveraging failure to check if the device is active.

References (7)

[Patch] http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=6c352ca9b4ee3e1e286ea9e8434bd8e69ac7d0d8

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/08/12/1

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/08/18/3

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/93255

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html

[Mailing List, Patch, Third Party Advisory] https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.html

[Third Party Advisory] https://security.gentoo.org/glsa/201609-01

Scores

CVSS v3 4.4

EPSS 0.0008

EPSS Percentile 22.3%

Attack Vector LOCAL

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

Classification

CWE

CWE-416

Status published

Affected Products (6)

qemu/qemu < 2.6.2

qemu/qemu

qemu/qemu

qemu/qemu

debian/debian_linux

n/a/n/a

Timeline

Published Dec 10, 2016

Tracked Since Feb 18, 2026