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Vulnerability record · CVE-2021-43619 · published 1 March 2022

CVE-2021-43619: Trustedfirmware trusted firmware-m classic buffer overflow vulnerability

Trustedfirmware · Trusted Firmware M

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.

7.8 CVSS 3.1 High EPSS 0.42% · top 66.2% CWE-120 · Classic buffer overflow
7.8CVSS 3.1 base score, v2 4.6
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://developer.arm.com/support/arm-security-updates Vendor Advisory
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/ PatchThird Party Advisory
https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/fwu_write_vulnerability.html ExploitPatchThird Party Advisory
https://www.trustedfirmware.org Product
https://developer.arm.com/support/arm-security-updates Vendor Advisory
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/ PatchThird Party Advisory
https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/fwu_write_vulnerability.html ExploitPatchThird Party Advisory
https://www.trustedfirmware.org Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-43619), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.