Qemu emulator built with an IDE AHCI emulation support is vulnerable to a null pointer dereference flaw. It occurs while unmapping the Frame Information Structure(FIS) & Command List Block(CLB) entries.
A privileged user inside guest could use this flaw to crash the Qemu process instance resulting in DoS.
Red Hat would like to thank Zuozhi Fzz of Alibaba Inc. for reporting this issue.
This has been rated as having Low security impact and is not currently
planned to be addressed in future updates. For additional information, refer
to the Red Hat Enterprise Linux Life Cycle:
Created qemu tracking bugs for this issue:
Affects: fedora-all [bug 1302952]
qemu-2.4.1-7.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
qemu-2.3.1-12.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.