PT-2021-7351 · Qemu+9 · Qemu+9
Marian Rehak
·
Published
2020-05-02
·
Updated
2026-06-09
·
CVE-2021-20221
CVSS v3.1
5.4
Medium
| Vector | AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L |
Name of the Vulnerable Software and Affected Versions
QEMU versions up to and including 4.2.0
Description
The issue is related to an out-of-bounds heap buffer access in the ARM Generic Interrupt Controller emulator of QEMU. This occurs because the interrupt ID written to the controller memory area is not masked to be 4 bits wide, potentially leading to issues when updating controller state fields and their subsequent processing. A privileged guest user may exploit this to crash the QEMU process on the host, resulting in a denial-of-service scenario.
Recommendations
For QEMU versions up to and including 4.2.0, consider updating to a version where this issue is fixed, as the current version may allow a privileged guest user to crash the QEMU process, leading to a denial-of-service scenario.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
DoS
Out of bounds Read
Memory Corruption
Found an issue in the description? Have something to add? Feel free to write us 👾
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Qemu
Red Hat
Rocky Linux
Suse
Ubuntu