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CVE-2021-20196

CVE-2021-20196

EPSS 0.5%CWE-476
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.
Affected products
n/a · qemu

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References
https://bugs.launchpad.net/qemu/+bug/1912780https://lists.debian.org/debian-lts-announce/2022/04/msg00002.htmlhttps://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlhttps://security.netapp.com/advisory/ntap-20210708-0004/https://www.openwall.com/lists/oss-security/2021/01/28/1