CVE-2026-3833: Improper Handling of Case Sensitivity in Red Hat Red Hat Enterprise Linux 10
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.
CVE-2026-3833: Improper Handling of Case Sensitivity in Red Hat Red Hat Enterprise Linux 10
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.
CVSS v3.1
Score 6.5medium
Affected software
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat
Red Hat Enterprise Linux 7 Extended Lifecycle Support
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red Hat
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red Hat
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red Hat
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red Hat
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
Red Hat
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
Red Hat
Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Red Hat
Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Red Hat
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Red Hat
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Red Hat
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
Red Hat
Red Hat Enterprise Linux 9.6 Extended Update Support
Red Hat
Red Hat OpenShift Container Platform 4.12
Red Hat
Red Hat OpenShift Container Platform 4.14
Red Hat
Red Hat OpenShift Container Platform 4.16
Red Hat
Red Hat OpenShift Container Platform 4.17
Red Hat
Red Hat OpenShift Container Platform 4.19
Red Hat
Red Hat Discovery 2
Red Hat
Red Hat Discovery 2
Red Hat
Red Hat Hardened Images
Red Hat
Red Hat Update Infrastructure 5
Red Hat
Red Hat Update Infrastructure 5
Red Hat
Red Hat Update Infrastructure 5
Red Hat
Red Hat Update Infrastructure 5
Red Hat
Red Hat Update Infrastructure 5
Red Hat
Red Hat Update Infrastructure 5
Red Hat
Red Hat Update Infrastructure 5
Red Hat
Red Hat Enterprise Linux 6
Red Hat
Red Hat OpenShift Container Platform 4
Red Hat
Red Hat OpenShift Container Platform 4
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-03-09T14:00:51.698Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-3833","vendor":"Red Hat"}]
Threat ID: 69f3969dcbff5d8610590861
Added to database: 04/30/2026, 17:51:25 UTC
Last enriched: 07/21/2026, 18:22:32 UTC
Last updated: 09/14/2026, 13:17:35 UTC
Views: 281
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