CVE-2021-43619 json
Trusted Firmware M 1.4.x through 1.4.1 has a buffer overflow issue in the Firmware Update partition.
published 2022-03-01 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30532
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- tf-m-user-guide.trustedfirmware.org https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/fwu_write_vulnerability.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-120 Buffer Copy without Checking Size of Input
References
-
git.trustedfirmware.org
/TF-M/trusted-firmware-m.git/
patch, third-party-advisory
-
tf-m-user-guide.trustedfirmware.org
/docs/security/security_advisories/fwu_write_vulnerability.html
exploit, patch, third-party-advisory
-
developer.arm.com
/support/arm-security-updates
vendor-advisory
-
trustedfirmware.org
product
Sources
- CVE List CVE-2021-43619
- NVD CVE-2021-43619
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