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: 2476963 2476964 2476965
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-25 07:19 UTC by OSIDB Bzimport
Modified: 2026-06-08 02:03 UTC (History)
3 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-2026:10739 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
Red Hat Product Errata RHSA-2026:19125 0 None None None 2026-05-19 16:05:12 UTC
Red Hat Product Errata RHSA-2026:19342 0 None None None 2026-05-19 21:41:48 UTC
Red Hat Product Errata RHSA-2026:19343 0 None None None 2026-05-19 21:37:09 UTC
Red Hat Product Errata RHSA-2026:19344 0 None None None 2026-05-19 21:37:02 UTC
Red Hat Product Errata RHSA-2026:20547 0 None None None 2026-05-26 03:03:53 UTC
Red Hat Product Errata RHSA-2026:20555 0 None None None 2026-05-26 04:59:03 UTC
Red Hat Product Errata RHSA-2026:20557 0 None None None 2026-05-26 02:48:52 UTC
Red Hat Product Errata RHSA-2026:20558 0 None None None 2026-05-26 03:50:30 UTC
Red Hat Product Errata RHSA-2026:20560 0 None None None 2026-05-26 03:04:22 UTC
Red Hat Product Errata RHSA-2026:20561 0 None None None 2026-05-26 03:43:25 UTC
Red Hat Product Errata RHSA-2026:20562 0 None None None 2026-05-26 01:57:04 UTC
Red Hat Product Errata RHSA-2026:20563 0 None None None 2026-05-26 03:18:17 UTC
Red Hat Product Errata RHSA-2026:20575 0 None None None 2026-05-26 04:00:42 UTC
Red Hat Product Errata RHSA-2026:20576 0 None None None 2026-05-26 04:55:34 UTC
Red Hat Product Errata RHSA-2026:20590 0 None None None 2026-05-26 04:31:06 UTC
Red Hat Product Errata RHSA-2026:21699 0 None None None 2026-05-28 07:49:19 UTC
Red Hat Product Errata RHSA-2026:21712 0 None None None 2026-05-28 09:33:29 UTC
Red Hat Product Errata RHSA-2026:21715 0 None None None 2026-05-28 09:37:54 UTC
Red Hat Product Errata RHSA-2026:21716 0 None None None 2026-05-28 09:44:12 UTC
Red Hat Product Errata RHSA-2026:21718 0 None None None 2026-05-28 09:55:40 UTC
Red Hat Product Errata RHSA-2026:21741 0 None None None 2026-05-28 11:38:23 UTC
Red Hat Product Errata RHSA-2026:21742 0 None None None 2026-05-28 12:02:36 UTC
Red Hat Product Errata RHSA-2026:22424 0 None None None 2026-06-02 08:16:54 UTC
Red Hat Product Errata RHSA-2026:22456 0 None None None 2026-06-02 16:05:17 UTC
Red Hat Product Errata RHSA-2026:23254 0 None None None 2026-06-04 11:12:56 UTC
Red Hat Product Errata RHSA-2026:23255 0 None None None 2026-06-04 11:24:32 UTC
Red Hat Product Errata RHSA-2026:23496 0 None None None 2026-06-04 22:07:48 UTC
Red Hat Product Errata RHSA-2026:24341 0 None None None 2026-06-08 02:03:57 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
Comment 11 errata-xmlrpc 2026-05-19 16:05:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:19125 https://access.redhat.com/errata/RHSA-2026:19125
Comment 12 errata-xmlrpc 2026-05-19 21:37:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:19344 https://access.redhat.com/errata/RHSA-2026:19344
Comment 13 errata-xmlrpc 2026-05-19 21:37:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:19343 https://access.redhat.com/errata/RHSA-2026:19343
Comment 14 errata-xmlrpc 2026-05-19 21:41:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:19342 https://access.redhat.com/errata/RHSA-2026:19342
Comment 15 errata-xmlrpc 2026-05-26 01:57:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:20562 https://access.redhat.com/errata/RHSA-2026:20562
Comment 16 errata-xmlrpc 2026-05-26 02:48:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:20557 https://access.redhat.com/errata/RHSA-2026:20557
Comment 17 errata-xmlrpc 2026-05-26 03:03:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:20547 https://access.redhat.com/errata/RHSA-2026:20547
Comment 18 errata-xmlrpc 2026-05-26 03:04:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:20560 https://access.redhat.com/errata/RHSA-2026:20560
Comment 19 errata-xmlrpc 2026-05-26 03:18:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:20563 https://access.redhat.com/errata/RHSA-2026:20563
Comment 20 errata-xmlrpc 2026-05-26 03:43:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:20561 https://access.redhat.com/errata/RHSA-2026:20561
Comment 21 errata-xmlrpc 2026-05-26 03:50:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:20558 https://access.redhat.com/errata/RHSA-2026:20558
Comment 22 errata-xmlrpc 2026-05-26 04:00:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:20575 https://access.redhat.com/errata/RHSA-2026:20575
Comment 23 errata-xmlrpc 2026-05-26 04:31:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:20590 https://access.redhat.com/errata/RHSA-2026:20590
Comment 24 errata-xmlrpc 2026-05-26 04:55:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:20576 https://access.redhat.com/errata/RHSA-2026:20576
Comment 25 errata-xmlrpc 2026-05-26 04:59:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:20555 https://access.redhat.com/errata/RHSA-2026:20555
Comment 26 errata-xmlrpc 2026-05-28 07:49:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:21699 https://access.redhat.com/errata/RHSA-2026:21699
Comment 27 errata-xmlrpc 2026-05-28 09:33:28 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-2026:21712 https://access.redhat.com/errata/RHSA-2026:21712
Comment 28 errata-xmlrpc 2026-05-28 09:37:53 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-2026:21715 https://access.redhat.com/errata/RHSA-2026:21715
Comment 29 errata-xmlrpc 2026-05-28 09:44:11 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 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:21716 https://access.redhat.com/errata/RHSA-2026:21716
Comment 30 errata-xmlrpc 2026-05-28 09:55:39 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 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:21718 https://access.redhat.com/errata/RHSA-2026:21718
Comment 31 errata-xmlrpc 2026-05-28 11:38:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:21741 https://access.redhat.com/errata/RHSA-2026:21741
Comment 32 errata-xmlrpc 2026-05-28 12:02:35 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-2026:21742 https://access.redhat.com/errata/RHSA-2026:21742
Comment 33 errata-xmlrpc 2026-06-02 08:16:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:22424 https://access.redhat.com/errata/RHSA-2026:22424
Comment 34 errata-xmlrpc 2026-06-02 16:05:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:22456 https://access.redhat.com/errata/RHSA-2026:22456
Comment 35 errata-xmlrpc 2026-06-04 11:12:54 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-2026:23254 https://access.redhat.com/errata/RHSA-2026:23254
Comment 36 errata-xmlrpc 2026-06-04 11:24:30 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-2026:23255 https://access.redhat.com/errata/RHSA-2026:23255
Comment 37 errata-xmlrpc 2026-06-04 22:07:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6 Extended Lifecycle Support  - EXTENSION

Via RHSA-2026:23496 https://access.redhat.com/errata/RHSA-2026:23496
Comment 38 errata-xmlrpc 2026-06-08 02:03:56 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-2026:24341 https://access.redhat.com/errata/RHSA-2026:24341
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