medium6.5
CVE-2021-20196
A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU.
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Qemu | Qemu | Version 5.2.0 |
| Debian | Debian Linux | Versions 9.0, 10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://bugs.launchpad.net/qemu/+bug/1912780
- https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://security.netapp.com/advisory/ntap-20210708-0004/
- https://www.openwall.com/lists/oss-security/2021/01/28/1
- https://bugs.launchpad.net/qemu/+bug/1912780
- https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://security.netapp.com/advisory/ntap-20210708-0004/
- https://www.openwall.com/lists/oss-security/2021/01/28/1