CVE-2021-20196

Description

A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

References

https://bugs.launchpad.net/qemu/+bug/1912780

https://www.openwall.com/lists/oss-security/2021/01/28/1

https://security.netapp.com/advisory/ntap-20210708-0004/

https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html

https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html

Details

Risk Information

CVSS v2

CVSS v3