Integer overflow in the load_multiboot function in hw/i386/multiboot.c in QEMU (aka Quick Emulator) allows local guest OS users to execute arbitrary code on the host via crafted multiboot header address values, which trigger an out-of-bounds write.
http://www.debian.org/security/2017/dsa-3991
http://www.openwall.com/lists/oss-security/2017/09/07/2
http://www.securityfocus.com/bid/100694
https://access.redhat.com/errata/RHSA-2017:3368
https://access.redhat.com/errata/RHSA-2017:3369
https://access.redhat.com/errata/RHSA-2017:3466
https://access.redhat.com/errata/RHSA-2017:3470
https://access.redhat.com/errata/RHSA-2017:3471
https://access.redhat.com/errata/RHSA-2017:3472
https://access.redhat.com/errata/RHSA-2017:3473
https://access.redhat.com/errata/RHSA-2017:3474
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
https://lists.nongnu.org/archive/html/qemu-devel/2017-09/msg01032.html
Source: MITRE
Published: 2017-09-08
Updated: 2020-11-16
Type: CWE-190
Base Score: 7.2
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 3.9
Severity: HIGH
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