CVE-2021-43619

Name: CVE-2021-43619
Creator: NVD / NIST
Published: 2022-03-01T05:15:07.803+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2021-43619 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Trusted Firmware M 1.4.x through 1.4.1 has a buffer overflow issue in the Firmware Update partition. In the IPC model, a psa_fwu_write caller from SPE or NSPE can overwrite stack memory locations.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

Trusted Firmware M 1.4.x through 1.4.1 has a buffer overflow issue in the Firmware Update partition. In the IPC model, a psa_fwu_write caller from SPE or NSPE can overwrite stack memory locations.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.41%

33.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Trustedfirmware	Trusted Firmware-M	1.4.0
Trustedfirmware	Trusted Firmware-M	1.4.1

References

https://developer.arm.com/support/arm-security-updatesVendor Advisory
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/Patch, Third Party Advisory
https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/fwu_write_vulnerability.htmlExploit, Patch, Third Party Advisory
https://www.trustedfirmware.orgProduct
https://developer.arm.com/support/arm-security-updatesVendor Advisory
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/Patch, Third Party Advisory
https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/fwu_write_vulnerability.htmlExploit, Patch, Third Party Advisory
https://www.trustedfirmware.orgProduct

Timeline

Published: Mar 1, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43619?

Trusted Firmware M 1.4.x through 1.4.1 has a buffer overflow issue in the Firmware Update partition. In the IPC model, a psa_fwu_write caller from SPE or NSPE can overwrite stack memory locations.

How severe is CVE-2021-43619?

CVE-2021-43619 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43619?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43619?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST