Description

In Mbed TLS through 4.0.0, there is a compiler-induced timing side channel (in RSA and CBC/ECB decryption) that only occurs with LLVM's select-optimize feature. TF-PSA-Crypto through 1.0.0 is also affected.

INFO

Published Date :

2026-04-01T00:00:00.000Z

Last Modified :

2026-04-01T20:00:06.815Z

Source :

mitre
AFFECTED PRODUCTS

The following products are affected by CVE-2025-66442 vulnerability.

Vendors Products
Arm
  • Mbed Tls
  • Tf-psa-crypto
Mbed-tls
  • Mbedtls
  • Tf-psa-crypto
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-66442.

URL Resource
https://github.com/Mbed-TLS/TF-PSA-Crypto/releases cve-icon cve-icon cve-icon
https://github.com/Mbed-TLS/mbedtls/releases cve-icon cve-icon cve-icon
https://mbed-tls.readthedocs.io/en/latest/security-advisories/ cve-icon cve-icon cve-icon
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-compiler-induced-constant-time-violations/ cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-66442 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-66442 cve-icon
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