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.
Published: 2026-04-09
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote Denial of Service
Action: Patch
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Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Tracking

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Advisories

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History

Sun, 03 May 2026 13:30:00 +0000

Type Values Removed Values Added
References

Wed, 22 Apr 2026 00:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat hardened Images
CPEs cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
Vendors & Products Redhat hardened Images

Fri, 10 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 09 Apr 2026 18:15:00 +0000

Type Values Removed Values Added
Title gnutls: gnutls: Remote Denial of Service via crafted ClientHello with invalid PSK binder Gnutls: gnutls: remote denial of service via crafted clienthello with invalid psk binder
First Time appeared Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat openshift
CPEs cpe:/a:redhat:hummingbird:1
cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat openshift
References

Wed, 11 Feb 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Gnu
Gnu gnutls
Vendors & Products Gnu
Gnu gnutls

Tue, 10 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
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.
Title gnutls: gnutls: Remote Denial of Service via crafted ClientHello with invalid PSK binder
Weaknesses CWE-476
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


Subscriptions

Gnu Gnutls
Redhat Enterprise Linux Hardened Images Hummingbird Openshift
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-05-03T13:15:17.692Z

Reserved: 2026-01-29T02:59:06.727Z

Link: CVE-2026-1584

cve-icon Vulnrichment

Updated: 2026-04-10T14:09:48.887Z

cve-icon NVD

Status : Modified

Published: 2026-04-09T18:16:44.047

Modified: 2026-05-03T14:16:26.763

Link: CVE-2026-1584

cve-icon Redhat

Severity : Important

Publid Date: 2026-02-09T00:00:00Z

Links: CVE-2026-1584 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-15T16:00:07Z

Weaknesses