CVE-2017-5856

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-03-16 · updated 2026-06-17
Weakness: CWE-401

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.

Affected products

Debian Linux: 8.0
QEMU: through 2.8.1.1

References

http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=765a707000e838c30b18d712fe6cb3dd8e0435f3
http://www.openwall.com/lists/oss-security/2017/02/01/19
http://www.openwall.com/lists/oss-security/2017/02/02/14
http://www.securityfocus.com/bid/95999
https://bugzilla.redhat.com/show_bug.cgi?id=1418342
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
https://security.gentoo.org/glsa/201702-28
http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=765a707000e838c30b18d712fe6cb3dd8e0435f3
http://www.openwall.com/lists/oss-security/2017/02/01/19
http://www.openwall.com/lists/oss-security/2017/02/02/14
http://www.securityfocus.com/bid/95999
https://bugzilla.redhat.com/show_bug.cgi?id=1418342

Get alerted when CVE-2017-5856 or the next vulnerability affects your stack