CVE-2017-5856

Name: CVE-2017-5856
Creator: NVD / NIST
Published: 2017-03-16T15:59:01.007+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2017-5856 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Memory leak in the megasas_handle_dcmd function in hw/scsi/megasas.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (host memory consumption) via MegaRAID Firmware Interface (MFI) commands with the sglist size set to a value over 2 Gb.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

Memory leak in the megasas_handle_dcmd function in hw/scsi/megasas.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (host memory consumption) via MegaRAID Firmware Interface (MFI) commands with the sglist size set to a value over 2 Gb.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.39%

31.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-401

Affected Software

Vendor	Product	Versions
Qemu	Qemu	<= 2.8.1.1
Debian	Debian Linux	8.0

References

http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=765a707000e838c30b18d712fe6cb3dd8e0435f3
http://www.openwall.com/lists/oss-security/2017/02/01/19Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/02/02/14Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/95999Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1418342Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlThird Party Advisory
https://security.gentoo.org/glsa/201702-28Third Party Advisory
http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=765a707000e838c30b18d712fe6cb3dd8e0435f3
http://www.openwall.com/lists/oss-security/2017/02/01/19Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/02/02/14Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/95999Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1418342Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlThird Party Advisory
https://security.gentoo.org/glsa/201702-28Third Party Advisory

Timeline

Published: Mar 16, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-5856?

How severe is CVE-2017-5856?

CVE-2017-5856 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2017-5856?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-5856?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST