7.5High

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

gnutls; Red Hat Red Hat Hardened Images; Red Hat Red Hat Enterprise Linux 10; Red Hat Red Hat Enterprise Linux 6 Published: 2026-04-09 21:00 (7 months ago)

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.

Weakness (CWE): CWE-476

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
gnu	gnutls	—
redhat	hardened images	—
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	all versions
Red Hat	Red Hat OpenShift Container Platform 4	—
—	gnutls	0

References and patches

RHSA-2026:7477 vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-1584 vdb-entryVendor Advisory
RHBZ#2435258 issue-trackingIssue TrackingVendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1584.json

CPE matches (NVD) (2)

cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*

CVSS score

7.5High

Source: redhat · CVSS 3.1

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

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

All scores (4)

cna	CVSS 3.1	7.5High
redhat-SADP	CVSS 3.1	7.5High
secalert@redhat.com	CVSS 3.1	7.5High
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	CVSS 3.1	7.5High

EPSS (chance of exploitation in 30 days)

1.37%

higher than 72% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: yes
Technical impact: partial

Timeline

ID reserved2026-01-29
Published2026-04-09 21:00
Reached IP-DB2026-10-24 23:42
Last updated2026-11-05 01:18

Assigned by (CNA): redhat
NVD status: Modified

View at source: CVE.org · NVD

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