CVE-2026-1584
HIGHGnutls: gnutls: remote denial of service via crafted clienthello with invalid psk binder
Title source: cnaDescription
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.
References (3)
Core 3
Core References
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:7477
https://access.redhat.com/errata/RHSA-2026:7477
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-1584
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2435258
https://bugzilla.redhat.com/show_bug.cgi?id=2435258
Scores
CVSS v3
7.5
EPSS
0.0133
EPSS Percentile
67.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-476
Status
published
Products (10)
gnu/gnutls
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 6
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 9
Red Hat/Red Hat Hardened Images
Red Hat/Red Hat Hardened Images
3.8.12-1.1.hum1
Red Hat/Red Hat OpenShift Container Platform 4
redhat/hardened_images
Published
Apr 09, 2026
Tracked Since
Apr 10, 2026