The cirrusinvalidateregion function in hw/display/cirrus_vga.c in Qemu allows local OS guest privileged users to cause a denial of service (out-of-bounds array access and QEMU process crash) via vectors related to negative pitch.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2017-18030.json"