Bug 2451113 (CVE-2026-34003) - CVE-2026-34003 xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access
Summary: CVE-2026-34003 xorg: xwayland: X.Org X server: Information exposure and denia...
Keywords:
Status: NEW
Alias: CVE-2026-34003
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:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-25 07:19 UTC by OSIDB Bzimport
Modified: 2026-05-04 12:29 UTC (History)
1 user (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-2026:10739 0 None None None 2026-04-27 08:29:54 UTC
Red Hat Product Errata RHSA-2026:11352 0 None None None 2026-04-28 11:21:05 UTC
Red Hat Product Errata RHSA-2026:11369 0 None None None 2026-04-28 14:53:19 UTC
Red Hat Product Errata RHSA-2026:11388 0 None None None 2026-04-28 17:58:04 UTC
Red Hat Product Errata RHSA-2026:11656 0 None None None 2026-04-29 12:01:28 UTC
Red Hat Product Errata RHSA-2026:11692 0 None None None 2026-04-29 13:07:54 UTC
Red Hat Product Errata RHSA-2026:13414 0 None None None 2026-05-04 12:29:14 UTC

Description OSIDB Bzimport 2026-03-25 07:19:37 UTC 
Out-of-bounds memory access vulnerability in the XKB key types request validation of the X.Org X server. The function CheckKeyTypes() loops over elements derived from the client’s request but does not perform adequate bounds checking to guarantee that subsequent reads remain within the request payload. A specially crafted request can cause CheckKeyTypes() to read uninitialized memory past the end of the request data, potentially leading to information exposure and/or a server crash. In certain configurations (as indicated by the submitted impact notes), this memory-safety flaw may be exploitable for higher impact outcomes.
Comment 4 errata-xmlrpc 2026-04-27 08:29:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:10739 https://access.redhat.com/errata/RHSA-2026:10739
Comment 5 errata-xmlrpc 2026-04-28 11:21:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:11352 https://access.redhat.com/errata/RHSA-2026:11352
Comment 6 errata-xmlrpc 2026-04-28 14:53:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:11369 https://access.redhat.com/errata/RHSA-2026:11369
Comment 7 errata-xmlrpc 2026-04-28 17:58:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:11388 https://access.redhat.com/errata/RHSA-2026:11388
Comment 8 errata-xmlrpc 2026-04-29 12:01:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:11656 https://access.redhat.com/errata/RHSA-2026:11656
Comment 9 errata-xmlrpc 2026-04-29 13:07:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:11692 https://access.redhat.com/errata/RHSA-2026:11692
Comment 10 errata-xmlrpc 2026-05-04 12:29:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:13414 https://access.redhat.com/errata/RHSA-2026:13414
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