High 7.5Published Apr 9, 2026

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

Updated under an hour ago (Oct 26, 2026, 9:23 PM ET)

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It affects Red Hat Hardened Images and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat Hardened Images

Exploited in the last 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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Sep 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat Hardened Images redhat:hummingbird	from 3.8.12-1.1.hum1 not affected	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CNA record
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift	4	CNA record
Red Hat Red Hat Hardened Images redhat:hummingbird	from 3.8.12-1.1.hum1 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CISA ADP
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift	4	CISA ADP
gnu gnutls gnu:gnutls	all versions	NVD
redhat hardened_images redhat:hardened_images	all versions	NVD

References

References

https://access.redhat.com/errata/RHSA-2026:7477	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-1584	vdb-entry, x-refsource-redhat, vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2435258	issue-tracking, x-refsource-redhat, vendor-advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1584.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.