Denial of Service Vulnerability in OpenSSL 3.2-3.6 for QUIC Protocol
CVE-2025-15468

Currently unrated

Key Information:

Vendor: OpenSSL
Status: OpenSSL
Vendor: CVE Published:; 27 January 2026

What is CVE-2025-15468?

A vulnerability in OpenSSL versions 3.2 to 3.6 associated with the QUIC protocol can lead to a NULL pointer dereference when an unsupported cipher suite is received from a peer. This issue, emerging from the SSL_CIPHER_find() function, causes the application to experience an abnormal termination, resulting in Denial of Service. Affected applications may call SSL_CIPHER_find() during the client_hello_cb callback, exposing them to this risk. Notably, OpenSSL versions 3.0, 1.1.1, and 1.0.2 remain unaffected by this issue.

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