The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access.
http://www.securityfocus.com/bid/103181
https://access.redhat.com/errata/RHSA-2018:1369
https://access.redhat.com/errata/RHSA-2018:2462
https://bugzilla.redhat.com/show_bug.cgi?id=1549798
https://lists.debian.org/debian-lts-announce/2018/04/msg00015.html
https://lists.debian.org/debian-lts-announce/2018/04/msg00016.html
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg06890.html
Source: MITRE
Published: 2018-03-01
Updated: 2020-05-14
Type: CWE-787
Base Score: 4.6
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 8.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Impact Score: 6
Exploitability Score: 2
Severity: HIGH