CVE-2026-1584 HIGH

CVE-2026-1584: Gnutls: gnutls: remote denial of service via crafted clienthello with invalid psk binder

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-476
Published April 9, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 9, 2026 CVE published
June 30, 2026 Record updated