GnuTLS NULL Deref in figure_common_ciphersuite()
CVE-2025-6395 Published on July 10, 2025

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

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Vulnerability Analysis

CVE-2025-6395 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
LOW
Availability Impact:
HIGH

Timeline

Reported to Red Hat.

Made public. 3 days later.

Weakness Type

NULL Pointer Dereference

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. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.


Products Associated with CVE-2025-6395

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2025-6395 are published in these products:

Canonical Ubuntu Linux
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Openshift
 
Red Hat Rhivos
 
Red Hat Rhel Eus
 
Red Hat Rhel E4s
 
Oracle
 
Red Hat Discovery
 
Red Hat Insights Proxy
 
Red Hat Ceph Storage
 

Exploit Probability

EPSS
0.05%
Percentile
14.05%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.