Vulnerability Details CVE-2021-20196
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 7.1%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 2.1
References
- 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
Products affected by CVE-2021-20196
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cpe:2.3:a:qemu:qemu:5.2.0
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cpe:2.3:o:debian:debian_linux:10.0
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cpe:2.3:o:debian:debian_linux:9.0