GnuTLS up to 3.8.11 ClientHello denial of service

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in GnuTLS up to 3.8.11. Affected by this issue is some unknown functionality of the component ClientHello Handler. The manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2026-1584. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in GnuTLS up to 3.8.11 and classified as problematic. This issue affects some unknown functionality of the component ClientHello Handler. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at seclists.org. The identification of this vulnerability is CVE-2026-1584. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 298449 (Linux Distros Unpatched Vulnerability : CVE-2026-1584), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.8.12 eliminates this vulnerability. The upgrade is hosted for download at gnupg.org.

The vulnerability is also documented in the databases at Tenable (298449) and CERT Bund (WID-SEC-2026-0359). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Debian Linux
  • Red Hat Enterprise Linux
  • Fedora Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • RESF Rocky Linux
  • Open Source GnuTLS

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 298449
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-1584

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: GnuTLS 3.8.12

Timelineinfo

02/10/2026 Advisory disclosed
02/10/2026 +0 days VulDB entry created
07/02/2026 +142 days VulDB entry last update

Sourcesinfo

Advisory: seclists.org
Status: Confirmed

CVE: CVE-2026-1584 (🔒)
GCVE (CVE): GCVE-0-2026-1584
GCVE (VulDB): GCVE-100-345137
CERT Bund: WID-SEC-2026-0359 - GnuTLS: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 02/10/2026 03:49
Updated: 07/02/2026 05:08
Changes: 02/10/2026 03:49 (53), 02/10/2026 13:53 (2), 02/10/2026 14:53 (7), 03/11/2026 19:41 (1), 07/02/2026 05:08 (12)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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