CVE-2016-6833

Published: Dec 10, 2016Modified: May 6, 2026

4.4

Vector

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

Exploitability: 0.8 / Impact: 3.6

Source: NVD

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.

Affected (5)

Products: Qemu: Qemu · Debian: Debian Linux

1 product

1 product

Configuration A

4 vulnerable

Vulnerable Software	Affected Versions
Qemu Qemu	Up to 2.6.2
Qemu Qemu	Version 2.7.0 rc0
Qemu Qemu	Version 2.7.0 rc1
Qemu Qemu	Version 2.7.0 rc2

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 8.0

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (14)

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

Source: secalert@redhat.com

http://www.openwall.com/lists/oss-security/2016/08/12/1

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2016/08/18/3

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://www.securityfocus.com/bid/93255

Source: secalert@redhat.com

Third Party AdvisoryVDB Entry

https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html

Source: secalert@redhat.com

Mailing ListThird Party Advisory

https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.html

Source: secalert@redhat.com

Mailing ListPatchThird Party Advisory

https://security.gentoo.org/glsa/201609-01

Source: secalert@redhat.com

Third Party Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.openwall.com/lists/oss-security/2016/08/12/1

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2016/08/18/3

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

http://www.securityfocus.com/bid/93255

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party AdvisoryVDB Entry

https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.html

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListPatchThird Party Advisory

https://security.gentoo.org/glsa/201609-01

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

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