Bug 2480688 (CVE-2026-42508) - CVE-2026-42508 golang.org/x/crypto/ssh/knownhosts: golang: golang.org/x/crypto/ssh/knownhosts: Revocation bypass via unchecked SignatureKey
Summary: CVE-2026-42508 golang.org/x/crypto/ssh/knownhosts: golang: golang.org/x/crypt...
Keywords:
Status: NEW
Alias: CVE-2026-42508
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2489773
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-22 04:02 UTC by OSIDB Bzimport
Modified: 2026-08-06 20:28 UTC (History)
61 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-2026:35833 0 None None None 2026-07-06 04:52:50 UTC
Red Hat Product Errata RHSA-2026:36796 0 None None None 2026-07-08 15:51:22 UTC
Red Hat Product Errata RHSA-2026:37072 0 None None None 2026-07-09 05:14:40 UTC
Red Hat Product Errata RHSA-2026:37123 0 None None None 2026-07-09 07:15:51 UTC
Red Hat Product Errata RHSA-2026:41019 0 None None None 2026-07-16 14:31:56 UTC
Red Hat Product Errata RHSA-2026:49944 0 None None None 2026-08-04 10:00:53 UTC
Red Hat Product Errata RHSA-2026:51288 0 None None None 2026-08-06 20:28:40 UTC

Description OSIDB Bzimport 2026-05-22 04:02:12 UTC 
Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.
Comment 1 errata-xmlrpc 2026-07-06 04:52:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:35833 https://access.redhat.com/errata/RHSA-2026:35833
Comment 2 errata-xmlrpc 2026-07-08 15:51:18 UTC 
This issue has been addressed in the following products:

  RHEM 1.0 for RHEL 9

Via RHSA-2026:36796 https://access.redhat.com/errata/RHSA-2026:36796
Comment 3 errata-xmlrpc 2026-07-09 05:14:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:37072 https://access.redhat.com/errata/RHSA-2026:37072
Comment 4 errata-xmlrpc 2026-07-09 07:15:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:37123 https://access.redhat.com/errata/RHSA-2026:37123
Comment 5 errata-xmlrpc 2026-07-16 14:31:52 UTC 
This issue has been addressed in the following products:

  RHEM 1.1 for RHEL 10
  RHEM 1.1 for RHEL 9

Via RHSA-2026:41019 https://access.redhat.com/errata/RHSA-2026:41019
Comment 6 errata-xmlrpc 2026-08-04 10:00:49 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-2026:49944 https://access.redhat.com/errata/RHSA-2026:49944
Comment 7 errata-xmlrpc 2026-08-06 20:28:36 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-2026:51288 https://access.redhat.com/errata/RHSA-2026:51288
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