CVE-2026-1584

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.

Score

CVSS 3.1 7.5 High

Status

Modified - secalert@redhat.com

Published

2026-04-09

Last modified

2026-10-26

Weaknesses

CWE-476

Affected products

• Gnutls (Gnu)
• Enterprise Linux (Redhat)
• Hardened Images (Redhat)
• Hummingbird (Redhat)
• Openshift (Redhat)

References

• https://access.redhat.com/errata/RHSA-2026:7477
• https://access.redhat.com/security/cve/CVE-2026-1584
• https://bugzilla.redhat.com/show_bug.cgi?id=2435258
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1584.json