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CVE-2026-3833: Improper Handling of Case Sensitivity in Red Hat Red Hat Enterprise Linux 10

0
Medium
VulnerabilityCVE-2026-3833cvecve-2026-3833
Published: 04/30/2026 (04/30/2026, 17:37:05 UTC)
Source: CVE Database V5
Vendor/Project: Red Hat
Product: 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

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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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