Bug 2467441 (CVE-2026-42012) - CVE-2026-42012 gnutls: gnutls: Certificate validation bypass due to improper handling of URI and SRV SANs
Summary: CVE-2026-42012 gnutls: gnutls: Certificate validation bypass due to improper ...
Keywords:
Status: NEW
Alias: CVE-2026-42012
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-06 19:17 UTC by OSIDB Bzimport
Modified: 2026-06-29 15:07 UTC (History)
6 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:26409 0 None None None 2026-06-16 16:39:26 UTC
Red Hat Product Errata RHSA-2026:30004 0 None None None 2026-06-25 18:07:38 UTC
Red Hat Product Errata RHSA-2026:30849 0 None None None 2026-06-29 02:48:33 UTC
Red Hat Product Errata RHSA-2026:30850 0 None None None 2026-06-29 02:30:18 UTC
Red Hat Product Errata RHSA-2026:32962 0 None None None 2026-06-29 09:47:22 UTC
Red Hat Product Errata RHSA-2026:33125 0 None None None 2026-06-29 15:07:33 UTC

Description OSIDB Bzimport 2026-05-06 19:17:52 UTC 
libgnutls: Suppress CN fallback in presence of URI and SRV SAN
   Certificates containing URI or SRV Subject Alternative Names no longer fall back to checking DNS hostnames against Common Name to avoid potential misuse of such certificates beyond their original purpose.
Comment 3 errata-xmlrpc 2026-06-16 16:39:25 UTC 
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
Comment 5 errata-xmlrpc 2026-06-25 18:07:37 UTC 
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
Comment 6 errata-xmlrpc 2026-06-29 02:30:17 UTC 
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
Comment 7 errata-xmlrpc 2026-06-29 02:48:32 UTC 
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
Comment 8 errata-xmlrpc 2026-06-29 09:47:21 UTC 
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
Comment 9 errata-xmlrpc 2026-06-29 15:07:31 UTC 
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
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