CVE-2025-12888 — Constant Time Issue with Xtensa-based ESP32 and X22519

CVE-2025-12888

Constant Time Issue with Xtensa-based ESP32 and X22519 PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
wolfSSL / wolfSSL	affected 0 before 5.8.4

CWE

CWE-203

References

https://https://github.com/wolfSSL/wolfssl/pull/9275

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.