CVE-2021-20196
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Qemu
PublishedMay 26, 2021
First seenMay 26, 2021
Weakness typeCWE-476NULL pointer dereference
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| qemu qemu | 5.2.0 | — |
| debian debian_linux | 9.0, 10.0 | — |
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