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Medium severity5.3NVD Advisory· Published Feb 20, 2024· Updated Jun 17, 2026

CVE-2023-6936

CVE-2023-6936

Description

In wolfSSL prior to 5.6.6, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS client or network attacker can trigger a buffer over-read on the heap of 5 bytes (WOLFSSL_CALLBACKS is only intended for debugging).

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Affected products

3
  • WolfSSL/Wolfssl3 versions
    cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*range: <5.6.6
    • (no CPE)range: <5.6.6
    • (no CPE)range: 0

Patches

Vulnerability mechanics

References

2

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