CVE-2026-42011— Gnutls: gnutls: security bypass due to incorrect name constraint handling
Possible ATT&CK Techniques 1AI
T1078 · Valid AccountsAffected Version Matrix 32
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I. Basic Information for CVE-2026-42011
Vulnerability Information
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Vulnerability Title
Gnutls: gnutls: security bypass due to incorrect name constraint handling
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
GnuTLS 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GnuTLS是GnuTLS开源的一款免费的用于实现SSL、TLS和DTLS协议的安全通信库。 GnuTLS存在信任管理问题漏洞，该漏洞源于当先前证书颁发机构仅有排除名称约束时，允许的名称约束被错误忽略，可能导致远程攻击者绕过证书验证中的关键名称约束检查，导致接受无效证书，可能对受影响系统实施欺骗或中间人攻击。
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 |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.8.10-4.el10_2 ~ * | cpe:/o:redhat:enterprise_linux:10.2 | |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:3.8.9-9.el10_0.19 ~ * | cpe:/o:redhat:enterprise_linux_eus:10.0 | |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | 0:3.3.29-9.el7_9.2 ~ * | cpe:/o:redhat:rhel_els:7 | |
| Red Hat | Red Hat Enterprise Linux 8 | 0:3.6.16-8.el8_10.6 ~ * | cpe:/a:redhat:enterprise_linux:8::appstream | |
| Red Hat | Red Hat Enterprise Linux 8 | 0:3.6.16-8.el8_10.6 ~ * | cpe:/a:redhat:enterprise_linux:8::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 0:3.6.14-10.el8_4.1 ~ * | cpe:/a:redhat:rhel_aus:8.4::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 0:4.13-3.el8_4.1 ~ * | cpe:/a:redhat:rhel_aus:8.4::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | 0:3.6.14-10.el8_4.1 ~ * | cpe:/a:redhat:rhel_aus:8.4::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | 0:4.13-3.el8_4.1 ~ * | cpe:/a:redhat:rhel_aus:8.4::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:3.6.16-5.el8_6.5 ~ * | cpe:/a:redhat:rhel_aus:8.6::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:4.13-3.el8_6.2 ~ * | cpe:/a:redhat:rhel_aus:8.6::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 0:3.6.16-5.el8_6.5 ~ * | cpe:/a:redhat:rhel_aus:8.6::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 0:4.13-3.el8_6.2 ~ * | cpe:/a:redhat:rhel_aus:8.6::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:3.6.16-7.el8_8.4 ~ * | cpe:/a:redhat:rhel_e4s:8.8::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:4.13-4.el8_8.1 ~ * | cpe:/a:redhat:rhel_e4s:8.8::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:3.6.16-7.el8_8.4 ~ * | cpe:/a:redhat:rhel_e4s:8.8::appstream | |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:4.13-4.el8_8.1 ~ * | cpe:/a:redhat:rhel_e4s:8.8::appstream | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.8.10-4.el9_8 ~ * | cpe:/a:redhat:enterprise_linux:9::appstream | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.8.10-4.el9_8 ~ * | 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_2.7 ~ * | cpe:/a:redhat:rhel_e4s:9.2::appstream | |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | 0:3.8.3-4.el9_4.6 ~ * | cpe:/a:redhat:rhel_e4s:9.4::appstream | |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:3.8.3-6.el9_6.4 ~ * | cpe:/a:redhat:rhel_eus:9.6::appstream | |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | 4.19.9.6.202607151909-0 ~ * | cpe:/a:redhat:openshift:4.19::el9 | |
| Red Hat | Red Hat Discovery 2 | 1782159791 ~ * | cpe:/a:redhat:discovery:2::el9 | |
| Red Hat | Red Hat Discovery 2 | 1782166952 ~ * | cpe:/a:redhat:discovery:2::el9 | |
| Red Hat | Red Hat Hardened Images | 3.8.13-1.hum1 ~ * | cpe:/a:redhat:hummingbird:1 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1781525684 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1781525671 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1781525693 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1781525739 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Enterprise Linux 6 | - | cpe:/o:redhat:enterprise_linux:6 | |
| Red Hat | Red Hat OpenShift Container Platform 4 | - | cpe:/a:redhat:openshift:4 |
II. Public POCs for CVE-2026-42011
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-42011 (14)
- 🔗 2467437 – (CVE-2026-42011) CVE-2026-42011 gnutls: gnutls: Security bypass due to incorrect name constraint handlingissue-trackingx_refsource_REDHAT
- 🔗 RHSA-2026:13274 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:20613 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:32962 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:30850 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:33125 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:43575 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:41921 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:30849 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:40762 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
Other References for CVE-2026-42011 (4)
IV. Related Vulnerabilities
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V. Comments for CVE-2026-42011
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