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.
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Wed, 01 Apr 2026 23:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Weaknesses | CWE-385 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-04-01T20:00:06.815Z
Reserved: 2025-12-01T00:00:00.000Z
Link: CVE-2025-66442
Updated: 2026-04-01T19:58:42.109Z
Status : Received
Published: 2026-04-01T20:16:22.107
Modified: 2026-04-01T20:16:22.107
Link: CVE-2025-66442
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