GnuTLS _gnutls_figure_common_ciphersuite null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in GnuTLS. Impacted is the function _gnutls_figure_common_ciphersuite. The manipulation results in null pointer dereference. This vulnerability is reported as CVE-2025-6395. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in GnuTLS (affected version unknown). Affected is the function _gnutls_figure_common_ciphersuite. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

A NULL pointer dereference flaw was found in the GnuTLS software in _gnutls_figure_common_ciphersuite().

The advisory is available at access.redhat.com. This vulnerability is traded as CVE-2025-6395 since 06/20/2025. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 242043 (Fedora 42 : gnutls (2025-16a24364ce)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (242043), EUVD (EUVD-2025-21000) and CERT Bund (WID-SEC-2025-1526). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Fedora Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Gentoo Linux
  • IBM Storwize
  • RESF Rocky Linux
  • IBM App Connect Enterprise
  • IBM MQ
  • Open Source GnuTLS
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM
  • Meinberg LANTIME

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.1

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (redhat): 🔒

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / 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: 242043
Nessus Name: Fedora 42 : gnutls (2025-16a24364ce)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/20/2025 CVE reserved
07/10/2025 +20 days Advisory disclosed
07/10/2025 +0 days VulDB entry created
11/28/2025 +141 days VulDB entry last update

Sourcesinfo

Advisory: access.redhat.com
Status: Not defined

CVE: CVE-2025-6395 (🔒)
GCVE (CVE): GCVE-0-2025-6395
GCVE (VulDB): GCVE-100-316002
EUVD: 🔒
CERT Bund: WID-SEC-2025-1526 - GnuTLS: Mehrere Schwachstellen

Entryinfo

Created: 07/10/2025 17:48
Updated: 11/28/2025 10:34
Changes: 07/10/2025 17:48 (61), 07/10/2025 18:35 (1), 07/13/2025 14:09 (2), 07/15/2025 10:22 (1), 10/10/2025 11:12 (7), 10/31/2025 14:07 (1), 11/07/2025 14:21 (1), 11/28/2025 10:34 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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