Skip to content

A NULL pointer dereference flaw was found in the floppy...

Moderate severity Unreviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Feb 2, 2023

Package

No package listed— Suggest a package

Affected versions

Unknown

Patched versions

Unknown

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.

References

Published by the National Vulnerability Database May 26, 2021
Published to the GitHub Advisory Database May 24, 2022
Last updated Feb 2, 2023

Severity

Moderate
6.5
/ 10

CVSS base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Weaknesses

CVE ID

CVE-2021-20196

GHSA ID

GHSA-ggpp-fxg5-wp87

Source code

No known source code

Dependabot alerts are not supported on this advisory because it does not have a package from a supported ecosystem with an affected and fixed version.

Learn more about GitHub language support

Checking history
See something to contribute? Suggest improvements for this vulnerability.