---
id: CVE-2025-6395
title: >-
  A NULL pointer dereference flaw was found in the GnuTLS software in
  _gnutls_figure_common_ciphersuite().
summary: >-
  A NULL pointer dereference flaw was found in the GnuTLS software in
  _gnutls_figure_common_ciphersuite().
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H'
cwe:
  - CWE-476
published: '2025-07-10'
updated: '2026-06-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-6395'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2025:16115'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:16116'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:17181'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:17348'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:17361'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:17415'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:19088'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:22529'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2025-6395'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2376755'
    label: secalert@redhat.com
  - url: 'https://gitlab.com/gnutls/gnutls/-/issues/1718'
    label: secalert@redhat.com
  - url: 'https://lists.gnupg.org/pipermail/gnutls-help/2025-July/004883.html'
    label: secalert@redhat.com
  - url: 'http://www.openwall.com/lists/oss-security/2025/07/11/3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/08/msg00005.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-082556.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.00676
epssPercentile: 0.50179
ingestedAt: '2026-06-29T13:24:34.393Z'
---

## Overview

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

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.