v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS users to cause a denial of service (crash) because of a race condition during file renaming.
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/153326
https://lists.debian.org/debian-lts-announce/2019/01/msg00023.html
https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg04489.html
https://seclists.org/bugtraq/2019/May/76
https://security-tracker.debian.org/tracker/CVE-2018-19489
https://usn.ubuntu.com/3923-1/