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CVE-2025-6395— Gnutls: null pointer dereference in _gnutls_figure_common_ciphersuite()

Quick assessment

Affected
CVE-2025-6395
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GnuTLS是一款免费的用于实现SSL、TLS和DTLS协议的安全通信库。 GnuTLS存在代码问题漏洞，该漏洞源于_gnutls_figure_common_ciphersuite函数中存在空指针取消引用，可能导致内存损坏和拒绝服务。

CVSS 6.5 · Medium EPSS 0.65% · P48

Possible ATT&CK Techniques 1 AI

T1200 · Hardware Additions

Affected Version Matrix 14

VendorProduct Version RangeStatus
None None < 3.8.10 affected
Red Hat Red Hat Ceph Storage 7 7< * unaffected
Red Hat Red Hat Discovery 2 2.3.0-1760554384< * unaffected
Red Hat Red Hat Enterprise Linux 10 0:3.8.9-9.el10_0.14< * unaffected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any unknown
Red Hat Red Hat Enterprise Linux 8 0:3.6.16-8.el8_10.4< * unaffected
0:3.6.16-8.el8_10.4< * unaffected
Red Hat Red Hat Enterprise Linux 9 0:3.8.3-6.el9_6.2< * unaffected
0:3.8.3-6.el9_6.2< * unaffected
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:3.7.6-21.el9_2.4< * unaffected
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:3.8.3-4.el9_4.4< * unaffected
Red Hat Red Hat Insights proxy 1.5 1.5.7-1759331989< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 any affected

I. Basic Information for CVE-2025-6395

Vulnerability Information
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Vulnerability Title
Gnutls: null pointer dereference in _gnutls_figure_common_ciphersuite()
Source: CVE Program / CVE List V5
Vulnerability Description
A NULL pointer dereference flaw was found in the GnuTLS software in _gnutls_figure_common_ciphersuite().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
GnuTLS 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GnuTLS是一款免费的用于实现SSL、TLS和DTLS协议的安全通信库。 GnuTLS存在代码问题漏洞，该漏洞源于_gnutls_figure_common_ciphersuite函数中存在空指针取消引用，可能导致内存损坏和拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 3.8.10 -
Red Hat Red Hat Enterprise Linux 10 0:3.8.9-9.el10_0.14 ~ * cpe:/o:redhat:enterprise_linux:10.0
Red Hat Red Hat Enterprise Linux 8 0:3.6.16-8.el8_10.4 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8 0:3.6.16-8.el8_10.4 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 9 0:3.8.3-6.el9_6.2 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:3.8.3-6.el9_6.2 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:3.7.6-21.el9_2.4 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:3.8.3-4.el9_4.4 ~ * cpe:/a:redhat:rhel_eus:9.4::appstream
Red Hat Red Hat Ceph Storage 7 7 ~ * cpe:/a:redhat:ceph_storage:7::el9
Red Hat Red Hat Discovery 2 2.3.0-1760554384 ~ * cpe:/a:redhat:discovery:2::el9
Red Hat Red Hat Insights proxy 1.5 1.5.7-1759331989 ~ * cpe:/a:redhat:insights_proxy:1.5::el9
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2025-6395

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III. Intelligence Information for CVE-2025-6395

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Vendor Advisories for CVE-2025-6395 (4)

Mailing List Discussions for CVE-2025-6395 (1)

IV. Related Vulnerabilities

Same weakness: CWE-476

V. Comments for CVE-2025-6395

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