Bug 2445763 (CVE-2026-3833)
| Summary: | CVE-2026-3833 gnutls: GnuTLS: Policy bypass due to case-sensitive nameConstraints comparison | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, kshier, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, security-response-team, sghai, sidsharm, stcannon, suppawar, teagle, vlaad, watson-tool-maintainers, yguenane |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
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.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2477365 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2026-03-09 14:03:06 UTC
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:20611 https://access.redhat.com/errata/RHSA-2026:20611 This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:20613 https://access.redhat.com/errata/RHSA-2026:20613 This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:20612 https://access.redhat.com/errata/RHSA-2026:20612 This issue has been addressed in the following products: Red Hat Enterprise Linux 10.0 Extended Update Support Via RHSA-2026:26409 https://access.redhat.com/errata/RHSA-2026:26409 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:30004 https://access.redhat.com/errata/RHSA-2026:30004 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat Enterprise Linux 8.8 Telecommunications Update Service Via RHSA-2026:30850 https://access.redhat.com/errata/RHSA-2026:30850 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Via RHSA-2026:30849 https://access.redhat.com/errata/RHSA-2026:30849 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Via RHSA-2026:32962 https://access.redhat.com/errata/RHSA-2026:32962 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Via RHSA-2026:33125 https://access.redhat.com/errata/RHSA-2026:33125 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:41921 https://access.redhat.com/errata/RHSA-2026:41921 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Extended Lifecycle Support Via RHSA-2026:43575 https://access.redhat.com/errata/RHSA-2026:43575 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.19 Via RHSA-2026:57402 https://access.redhat.com/errata/RHSA-2026:57402 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.17 Via RHSA-2026:60019 https://access.redhat.com/errata/RHSA-2026:60019 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.12 Via RHSA-2026:59831 https://access.redhat.com/errata/RHSA-2026:59831 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.16 Via RHSA-2026:62549 https://access.redhat.com/errata/RHSA-2026:62549 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.14 Via RHSA-2026:62409 https://access.redhat.com/errata/RHSA-2026:62409 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.18 Via RHSA-2026:65851 https://access.redhat.com/errata/RHSA-2026:65851 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.13 Via RHSA-2026:65839 https://access.redhat.com/errata/RHSA-2026:65839 |