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Vulnerability record · CVE-2026-1584 · published 9 April 2026

CVE-2026-1584: Gnutls null pointer dereference vulnerability

Gnu · Gnutls

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.

7.5 CVSS 3.1 High EPSS 1.3% · top 30.2% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
7References
1 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-1584), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.