Bug 2467289 (CVE-2026-42010)
| Summary: | CVE-2026-42010 gnutls: gnutls: Authentication Bypass via NUL Character in Username | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security <prodsec-ir-bot> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | kshier, rhel-process-autobot, stcannon, teagle, 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. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.
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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: | |||
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Description
OSIDB Bzimport
2026-05-06 17:08:33 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 OpenShift Container Platform 4.22 Via RHSA-2026:34790 https://access.redhat.com/errata/RHSA-2026:34790 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.20 Via RHSA-2026:34788 https://access.redhat.com/errata/RHSA-2026:34788 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.21 Via RHSA-2026:34764 https://access.redhat.com/errata/RHSA-2026:34764 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 |