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CVE-2026-3833

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

Description (CNA)

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 (CNA)

Vendor / productVersions
Not supplied / Not suppliedaffected 0 before 3.8.13
Red Hat / Red Hat Enterprise Linux 10unaffected 0:3.8.10-4.el10_2 before *
Red Hat / Red Hat Enterprise Linux 10.0 Extended Update Supportunaffected 0:3.8.9-9.el10_0.19 before *
Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Supportunaffected 0:3.3.29-9.el7_9.2 before *
Red Hat / Red Hat Enterprise Linux 8unaffected 0:3.6.16-8.el8_10.6 before *
Red Hat / Red Hat Enterprise Linux 8unaffected 0:3.6.16-8.el8_10.6 before *
Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportunaffected 0:3.6.14-10.el8_4.1 before *
Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportunaffected 0:4.13-3.el8_4.1 before *
Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onunaffected 0:3.6.14-10.el8_4.1 before *
Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onunaffected 0:4.13-3.el8_4.1 before *
Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportunaffected 0:3.6.16-5.el8_6.5 before *
Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportunaffected 0:4.13-3.el8_6.2 before *
Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onunaffected 0:3.6.16-5.el8_6.5 before *
Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onunaffected 0:4.13-3.el8_6.2 before *
Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Serviceunaffected 0:3.6.16-7.el8_8.4 before *
Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Serviceunaffected 0:4.13-4.el8_8.1 before *
Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutionsunaffected 0:3.6.16-7.el8_8.4 before *
Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutionsunaffected 0:4.13-4.el8_8.1 before *
Red Hat / Red Hat Enterprise Linux 9unaffected 0:3.8.10-4.el9_8 before *
Red Hat / Red Hat Enterprise Linux 9unaffected 0:3.8.10-4.el9_8 before *
Red Hat / Red Hat Enterprise Linux 9.2 Update Services for SAP Solutionsunaffected 0:3.7.6-21.el9_2.7 before *
Red Hat / Red Hat Enterprise Linux 9.4 Update Services for SAP Solutionsunaffected 0:3.8.3-4.el9_4.6 before *
Red Hat / Red Hat Enterprise Linux 9.6 Extended Update Supportunaffected 0:3.8.3-6.el9_6.4 before *
Red Hat / Red Hat OpenShift Container Platform 4.12unaffected 412.86.202608241157-0 before *
Red Hat / Red Hat OpenShift Container Platform 4.13unaffected 413.92.202609080414-0 before *
Red Hat / Red Hat OpenShift Container Platform 4.14unaffected 414.92.202609011250-0 before *
Red Hat / Red Hat OpenShift Container Platform 4.15unaffected 415.92.202609140326-0 before *
Red Hat / Red Hat OpenShift Container Platform 4.16unaffected 416.94.202609011112-0 before *
Red Hat / Red Hat OpenShift Container Platform 4.17unaffected 417.94.202608250221-0 before *
Red Hat / Red Hat OpenShift Container Platform 4.18unaffected 418.94.202609031320-0 before *
Red Hat / Red Hat OpenShift Container Platform 4.19unaffected 4.19.9.6.202608182320-0 before *
Red Hat / Cert Manager support for Red Hat OpenShift release 1.17unaffected 1791371080 before *
Red Hat / Cert Manager support for Red Hat OpenShift release 1.17unaffected 1791371069 before *
Red Hat / Cert Manager support for Red Hat OpenShift release 1.17unaffected 1791788287 before *
Red Hat / Cert Manager support for Red Hat OpenShift release 1.17unaffected 1791970484 before *
Red Hat / Cert Manager support for Red Hat OpenShift release 1.18unaffected 1791459707 before *
Red Hat / Cert Manager support for Red Hat OpenShift release 1.18unaffected 1791459711 before *
Red Hat / Cert Manager support for Red Hat OpenShift release 1.18unaffected 1791459759 before *
Red Hat / Cert Manager support for Red Hat OpenShift release 1.18unaffected 1789029076 before *
Red Hat / Cert Manager support for Red Hat OpenShift release 1.18unaffected 1791966259 before *
Red Hat / Cert Manager support for Red Hat OpenShift release 1.20unaffected 1790598593 before *
Red Hat / Red Hat Discovery 2unaffected 1782159791 before *
Red Hat / Red Hat Discovery 2unaffected 1782166952 before *
Red Hat / Red Hat Hardened Imagesunaffected 3.8.13-1.hum1 before *
Red Hat / Red Hat OpenShift AI 3.4unaffected 1790703542 before *
Red Hat / Red Hat Update Infrastructure 5unaffected 1781525684 before *
Red Hat / Red Hat Update Infrastructure 5unaffected 1781525671 before *
Red Hat / Red Hat Update Infrastructure 5unaffected 1781525693 before *
Red Hat / Red Hat Update Infrastructure 5unaffected 1781525739 before *
Red Hat / Red Hat Update Infrastructure 5unaffected 1787241211 before *
Red Hat / Red Hat Update Infrastructure 5unaffected 1787135742 before *
Red Hat / Red Hat Update Infrastructure 5unaffected 1787241260 before *
Red Hat / Red Hat Enterprise Linux 6unaffected
Red Hat / Red Hat OpenShift Container Platform 4unknown

CWE

CWE-178

References

ADP enrichment

CISA-ADP

No English description supplied.