CVE-2016-7908

MEDIUM

Qemu < 2.7.1 - Infinite Loop

Title source: rule

Description

The mcf_fec_do_tx function in hw/net/mcf_fec.c in QEMU (aka Quick Emulator) does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags.

References (8)

[Patch] http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=070c4b92b8cd5390889716677a0b92444d6e087a

[Mailing List, Third Party Advisory] http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/10/03/2

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/10/03/5

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/93273

[Third Party Advisory] https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html

[Mailing List, Patch, Vendor Advisory] https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05557.html

[Third Party Advisory] https://security.gentoo.org/glsa/201611-11

Scores

CVSS v3 4.4

EPSS 0.0013

EPSS Percentile 32.2%

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-835

Status published

Affected Products (3)

qemu/qemu < 2.7.1

debian/debian_linux

n/a/n/a

Timeline

Published Oct 05, 2016

Tracked Since Feb 18, 2026