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CVE-2025-12888

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CVE-2025-12888

Published: Nov 21, 2025

Modified: Dec 8, 2025

PUBLISHED

Description

Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architecture limitations, specifically with the Xtensa-based ESP32 chips. If targeting Xtensa it is recommended to use the low memory implementations of X25519, which is now turned on as the default for Xtensa.

VendorProductVersions

wolfSSL

wolfSSL

affected
0 - < 5.8.4

Weaknesses (CWE)

CWE-203

References

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