CVE-2016-6833

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

10/12/2016

Last modified:

12/04/2025

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 4.40 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

4.40

Severity 3.x

MEDIUM

Vector 2.0

AV:L/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 2.10 LOW
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0

2.10

Severity 2.0

LOW

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:qemu:qemu::::::::		2.6.2 (including)
cpe:2.3:a:qemu:qemu:2.7.0:rc0::::::
cpe:2.3:a:qemu:qemu:2.7.0:rc1::::::
cpe:2.3:a:qemu:qemu:2.7.0:rc2::::::
cpe:2.3:o:debian:debian_linux:8.0:::::::*

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:qemu:qemu::::::::		2.6.2 (including)
cpe:2.3:a:qemu:qemu:2.7.0:rc0::::::
cpe:2.3:a:qemu:qemu:2.7.0:rc1::::::
cpe:2.3:a:qemu:qemu:2.7.0:rc2::::::
cpe:2.3:o:debian:debian_linux:8.0:::::::*

CVE-2016-6833

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools