CVE-2016-7421

MEDIUM

Qemu < 2.7.1 - Denial of Service

Title source: rule

Description

The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by leveraging failure to limit process IO loop to the ring size.

References (7)

[Patch] http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=d251157ac1928191af851d199a9ff255d330bec9

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/09/16/3

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/09/16/9

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/92998

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

[Patch, Third Party Advisory] https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03609.html

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

Scores

CVSS v3 4.4

EPSS 0.0011

EPSS Percentile 29.4%

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-834

Status published

Affected Products (3)

qemu/qemu < 2.7.1

debian/debian_linux

n/a/n/a

Timeline

Published Dec 10, 2016

Tracked Since Feb 18, 2026