Medium severity5.1NVD Advisory· Published Apr 1, 2026· Updated Apr 3, 2026
CVE-2025-66442
CVE-2025-66442
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
4cpe:2.3:a:arm:tf-psa-crypto:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:arm:tf-psa-crypto:*:*:*:*:*:*:*:*range: <=1.0.0
- (no CPE)range: <=1.0.0
Patches
Vulnerability mechanics
References
4- mbed-tls.readthedocs.io/en/latest/security-advisories/nvdVendor Advisory
- mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-compiler-induced-constant-time-violations/nvdVendor Advisory
- github.com/Mbed-TLS/TF-PSA-Crypto/releasesnvdRelease Notes
- github.com/Mbed-TLS/mbedtls/releasesnvdRelease Notes
News mentions
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