CVE-2026-1584

Gnutls: gnutls: remote denial of service via crafted clienthello with invalid psk binder

Published: Apr 9, 2026Updated: Sep 1, 2026 Sources: CVE List NVDCWE-476

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-476

Affected Products

Red Hat

commercial·USaka redhat

hardened imagesOn-prem

Operating Systems / linux-distro

Red Hat Hardened ImagesOn-premOS

Operating Systems / linux-distro

Red Hat Enterprise Linux 10On-premOS

Operating Systems / linux-distro

Red Hat OpenShift Container Platform 4SaaSSaaS Service

Cloud & SaaS / container-orchestration

gnu

oss-project·USaka g. nu

gnutls

OSS Libraries

and 5 more affected products View all →

Exploitability

Official Patch Available

Workaround Available

Is your org exposed to CVE-2026-1584?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Impact

Initial Access

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References

https://access.redhat.com/errata/RHSA-2026:7477

access.redhat.com

https://access.redhat.com/security/cve/CVE-2026-1584

access.redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2435258

bugzilla.redhat.com

and 1 more references View all →

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