CVE-2022-42905: wolfSSL

Critical severity, CVSS 9.1. EPSS: 2.1% chance of exploitation in the next 30 days.

In wolfSSL before 5.5.2, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS 1.3 client or network attacker can trigger a buffer over-read on the heap of 5 bytes. (WOLFSSL_CALLBACKS is only intended for debugging.)

Affected products

• wolfSSL wolfSSL: before 5.5.2 (fixed in 5.5.2)

Published 2022-11-07. Last modified 2026-06-17.