CVE-2016-7421 Information

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.

CVSS Vector

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

Reference

http://git.qemu.org/?p=qemu.git;a=commit;h=d251157ac1928191af851d199a9ff255d330bec9 http://www.openwall.com/lists/oss-security/2016/09/16/3 http://www.openwall.com/lists/oss-security/2016/09/16/9 http://www.securityfocus.com/bid/92998 https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03609.html https://security.gentoo.org/glsa/201609-01

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

4.4