VDB
DEBIAN-CVE-2021-20196
DEBIAN-CVE-2021-20196
PUBLISHED
CVSS 6.5 MEDIUM
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.
Risk Scores
CVSS 3.1
6.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | qemu | 0, 0, 0 |
| Debian:11 | qemu | 0, 1:5.2+dfsg-11+deb11u2, * |
| Debian:13 | qemu | 0, 0, 0 |
| Debian:12 | qemu | 0, 0, 0 |
Timeline
- May 26, 2021 CVE Published
- Apr 28, 2026 CVE Updated