CVE-2026-1584: GNU Gnutls

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

A flaw was found in gnutls. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted ClientHello message with an invalid Pre-Shared Key (PSK) binder value during the TLS handshake. This can lead to a NULL pointer dereference, causing the server to crash and resulting in a remote Denial of Service (DoS) condition.

Affected products

• GNU Gnutls: affected versions not specified
• Red Hat Hardened Images: affected versions not specified

Published 2026-04-09. Last modified 2026-09-01.