What is the severity of CVE-2021-27562?

CVE-2021-27562 has been classified as a serious vulnerability due to its potential impact on system stability and secure data integrity.

How do I fix CVE-2021-27562?

To mitigate CVE-2021-27562, it's recommended to update Arm Trusted Firmware M to version 1.2 or later, where the vulnerability is addressed.

What type of vulnerability is CVE-2021-27562?

CVE-2021-27562 is identified as an out-of-bounds write vulnerability within Arm Trusted Firmware M.

What can happen if CVE-2021-27562 is exploited?

Exploitation of CVE-2021-27562 may lead to a system halt, overwrite of secure data, and unauthorized printing of secure information.

Who is affected by CVE-2021-27562?

CVE-2021-27562 affects users and systems running Arm Trusted Firmware M versions up to and including 1.2.

Vulnerability/
CVE-2021-27562

Exploited

medium

5.5

CWE

787

25/5/2021

4/2/2025

CVE-2021-27562: Arm Trusted Firmware Out-of-Bounds Write Vulnerability

First published: Tue May 25 2021(Updated: )

In Arm Trusted Firmware M through 1.2, the NS world may trigger a system halt, an overwrite of secure data, or the printing out of secure data when calling secure functions under the NSPE handler mode.

Credit: cve@mitre.org cve@mitre.org

Affected Software	Affected Version	How to fix
ARM Trusted Firmware-A
Arm Trusted Firmware-m	<=1.2
Arm Trusted Firmware-m
All of
Arm Trusted Firmware-m	<=1.2
Arm Trusted Firmware-m

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-27562?
CVE-2021-27562 has been classified as a serious vulnerability due to its potential impact on system stability and secure data integrity.
How do I fix CVE-2021-27562?
To mitigate CVE-2021-27562, it's recommended to update Arm Trusted Firmware M to version 1.2 or later, where the vulnerability is addressed.
What type of vulnerability is CVE-2021-27562?
CVE-2021-27562 is identified as an out-of-bounds write vulnerability within Arm Trusted Firmware M.
What can happen if CVE-2021-27562 is exploited?
Exploitation of CVE-2021-27562 may lead to a system halt, overwrite of secure data, and unauthorized printing of secure information.
Who is affected by CVE-2021-27562?
CVE-2021-27562 affects users and systems running Arm Trusted Firmware M versions up to and including 1.2.

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