CVE-2025-66442

MEDIUM

5.1

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.

CVE Details

CVSS v3.1 Score5.1

SeverityMEDIUM

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

Attack VectorLOCAL

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published4/1/2026

Last Modified4/3/2026

Sourcenvd

Honeypot Sightings0

Affected Products

arm:mbed_tlsarm:tf-psa-crypto

Weaknesses (CWE)

CWE-385

References

https://github.com/Mbed-TLS/TF-PSA-Crypto/releases(cve@mitre.org)

https://github.com/Mbed-TLS/mbedtls/releases(cve@mitre.org)

https://mbed-tls.readthedocs.io/en/latest/security-advisories/(cve@mitre.org)

https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-compiler-induced-constant-time-violations/(cve@mitre.org)

IOC Correlations

No correlations recorded

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