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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2026-3833

Gnutls: gnutls: policy bypass due to case-sensitive nameconstraints comparison

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
redhat

Description

A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of `nameConstraints` labels, specifically for `dNSName` (DNS) or `rfc822Name` (email) constraints within `excludedSubtrees` or `permittedSubtrees`. A remote attacker can exploit this by crafting a leaf certificate with casing differences in the Subject Alternative Name (SAN), leading to a policy bypass where a certificate that should be rejected is instead accepted. This could result in unauthorized access or information disclosure.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

gnutls

Default version status: unaffected

  • 0 to < 3.8.13affected

Red Hat Red Hat Enterprise Linux 10

Default version status: affected

  • 0:3.8.10-4.el10_2 to < *unaffected

Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support

Default version status: affected

  • 0:3.8.9-9.el10_0.19 to < *unaffected

Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

Default version status: affected

  • 0:3.3.29-9.el7_9.2 to < *unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:3.6.16-8.el8_10.6 to < *unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:3.6.16-8.el8_10.6 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

Default version status: affected

  • 0:3.6.14-10.el8_4.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

Default version status: affected

  • 0:4.13-3.el8_4.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Default version status: affected

  • 0:3.6.14-10.el8_4.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Default version status: affected

  • 0:4.13-3.el8_4.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

Default version status: affected

  • 0:3.6.16-5.el8_6.5 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

Default version status: affected

  • 0:4.13-3.el8_6.2 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Default version status: affected

  • 0:3.6.16-5.el8_6.5 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Default version status: affected

  • 0:4.13-3.el8_6.2 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Default version status: affected

  • 0:3.6.16-7.el8_8.4 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Default version status: affected

  • 0:4.13-4.el8_8.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

Default version status: affected

  • 0:3.6.16-7.el8_8.4 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

Default version status: affected

  • 0:4.13-4.el8_8.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:3.8.10-4.el9_8 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:3.8.10-4.el9_8 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Default version status: affected

  • 0:3.7.6-21.el9_2.7 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Default version status: affected

  • 0:3.8.3-4.el9_4.6 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support

Default version status: affected

  • 0:3.8.3-6.el9_6.4 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.12

Default version status: affected

  • 412.86.202608241157-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.13

Default version status: affected

  • 413.92.202609080414-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.14

Default version status: affected

  • 414.92.202609011250-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.15

Default version status: affected

  • 415.92.202609140326-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.16

Default version status: affected

  • 416.94.202609011112-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.17

Default version status: affected

  • 417.94.202608250221-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.18

Default version status: affected

  • 418.94.202609031320-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.19

Default version status: affected

  • 4.19.9.6.202608182320-0 to < *unaffected

Red Hat Cert Manager support for Red Hat OpenShift release 1.17

Default version status: affected

  • 1791371080 to < *unaffected

Red Hat Cert Manager support for Red Hat OpenShift release 1.17

Default version status: affected

  • 1791371069 to < *unaffected

Red Hat Cert Manager support for Red Hat OpenShift release 1.17

Default version status: affected

  • 1791788287 to < *unaffected

Red Hat Cert Manager support for Red Hat OpenShift release 1.17

Default version status: affected

  • 1791970484 to < *unaffected

Red Hat Cert Manager support for Red Hat OpenShift release 1.18

Default version status: affected

  • 1791459707 to < *unaffected

Red Hat Cert Manager support for Red Hat OpenShift release 1.18

Default version status: affected

  • 1791459711 to < *unaffected

Red Hat Cert Manager support for Red Hat OpenShift release 1.18

Default version status: affected

  • 1791459759 to < *unaffected

Red Hat Cert Manager support for Red Hat OpenShift release 1.18

Default version status: affected

  • 1789029076 to < *unaffected

Red Hat Cert Manager support for Red Hat OpenShift release 1.18

Default version status: affected

  • 1791966259 to < *unaffected

Red Hat Cert Manager support for Red Hat OpenShift release 1.20

Default version status: affected

  • 1790598593 to < *unaffected

Red Hat Red Hat Discovery 2

Default version status: affected

  • 1782159791 to < *unaffected

Red Hat Red Hat Discovery 2

Default version status: affected

  • 1782166952 to < *unaffected

Red Hat Red Hat Hardened Images

Default version status: affected

  • 3.8.13-1.hum1 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1790703542 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1781525684 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1781525671 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1781525693 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1781525739 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1787241211 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1787135742 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1787241260 to < *unaffected

Red Hat Red Hat Enterprise Linux 6

Default version status: unaffected

Red Hat Red Hat OpenShift Container Platform 4

Default version status: unknown

References