CVE-2026-1584

High

Description

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.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Gnutls

PublishedApr 9, 2026

First seenApr 9, 2026

Weakness typeCWE-476NULL pointer dereference

How to fix

Vendor advisories

access.redhat.com/security/cve/CVE-2026-1584
bugzilla.redhat.com/show_bug.cgi?id=2435258
access.redhat.com/errata/RHSA-2026:7477

Affected products

Product	Affected versions	Fixed in
gnu gnutls	No range specified	—
redhat hardened_images	No range specified	—

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