CVE-2025-66442

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score

5.1 / 10

Vector String

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

Vulnerability 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.

Vulnerability Details

Published Date

April 01, 2026

Last Modified

April 03, 2026

CWE ID

CWE-385

Source

NVD

Vendor

arm

Product

mbed_tls

External References

https://github.com/Mbed-TLS/TF-PSA-Crypto/releases
https://github.com/Mbed-TLS/mbedtls/releases
https://mbed-tls.readthedocs.io/en/latest/security-advisories/
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-compiler-induced-constant-time-violations/

CVE-2025-66442

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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