Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-34001
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-23 16:16:24 UTC
Updated2026-07-15 02:20:28 UTC
DescriptionA flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.002640000 probability, percentile 0.179710000 (date 2026-07-18)

Problem Types: CWE-825 | CWE-825 Expired Pointer Dereference

VersionSourceTypeScoreSeverityVector
3.1ADPCVSS7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 10 unaffected 0:24.1.5-6.el10_1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 10 unaffected 0:24.1.9-4.el10_2 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support unaffected 0:24.1.5-6.el10_0 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION unaffected 0:1.1.0-25.el6_10.16 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support unaffected 0:1.20.4-34.el7_9 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support unaffected 0:1.8.0-36.el7_9.4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:21.1.3-20.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:1.20.11-28.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:1.15.0-9.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support unaffected 0:1.20.10-4.el8_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support unaffected 0:1.11.0-8.el8_4.15 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On unaffected 0:1.20.10-4.el8_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On unaffected 0:1.11.0-8.el8_4.15 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support unaffected 0:21.1.3-2.el8_6.6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support unaffected 0:1.20.11-7.el8_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support unaffected 0:1.12.0-6.el8_6.17 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On unaffected 0:1.12.0-6.el8_6.17 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service unaffected 0:21.1.3-2.el8_6.6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service unaffected 0:1.20.11-7.el8_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions unaffected 0:21.1.3-2.el8_6.6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions unaffected 0:1.20.11-7.el8_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service unaffected 0:21.1.3-13.el8_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service unaffected 0:1.20.11-18.el8_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service unaffected 0:1.12.0-15.el8_8.17 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions unaffected 0:21.1.3-13.el8_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions unaffected 0:1.20.11-18.el8_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions unaffected 0:1.12.0-15.el8_8.17 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.15.0-6.el9_7.1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:23.2.7-6.el9_7 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.20.11-33.el9_7 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.15.0-7.el9_8.1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.20.11-34.el9_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:24.1.9-4.el9_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions unaffected 0:21.1.3-5.el9_0 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions unaffected 0:1.20.11-13.el9_0 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions unaffected 0:1.11.0-22.el9_0.17 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions unaffected 0:21.1.3-10.el9_2 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions unaffected 0:1.20.11-20.el9_2 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions unaffected 0:1.12.0-14.el9_2.14 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support unaffected 0:1.20.11-28.el9_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support unaffected 0:22.1.9-8.el9_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support unaffected 0:1.13.1-8.el9_4.9 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support unaffected 0:1.20.11-33.el9_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support unaffected 0:23.2.7-6.el9_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support unaffected 0:1.14.1-10.el9_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 10 unaffected 0:24.1.5-6.el10_1 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 10 unaffected 0:24.1.9-4.el10_2 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support unaffected 0:24.1.5-6.el10_0 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION unaffected 0:1.1.0-25.el6_10.16 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support unaffected 0:1.20.4-34.el7_9 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support unaffected 0:1.8.0-36.el7_9.4 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8 unaffected 0:21.1.3-20.el8_10 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8 unaffected 0:1.20.11-28.el8_10 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8 unaffected 0:1.15.0-9.el8_10 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support unaffected 0:1.20.10-4.el8_4 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support unaffected 0:1.11.0-8.el8_4.15 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On unaffected 0:1.20.10-4.el8_4 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On unaffected 0:1.11.0-8.el8_4.15 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support unaffected 0:21.1.3-2.el8_6.6 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support unaffected 0:1.20.11-7.el8_6 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support unaffected 0:1.12.0-6.el8_6.17 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On unaffected 0:1.12.0-6.el8_6.17 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service unaffected 0:21.1.3-2.el8_6.6 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service unaffected 0:1.20.11-7.el8_6 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions unaffected 0:21.1.3-2.el8_6.6 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions unaffected 0:1.20.11-7.el8_6 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service unaffected 0:21.1.3-13.el8_8 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service unaffected 0:1.20.11-18.el8_8 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service unaffected 0:1.12.0-15.el8_8.17 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions unaffected 0:21.1.3-13.el8_8 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions unaffected 0:1.20.11-18.el8_8 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions unaffected 0:1.12.0-15.el8_8.17 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.15.0-6.el9_7.1 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.15.0-7.el9_8.1 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9 unaffected 0:23.2.7-6.el9_7 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9 unaffected 0:24.1.9-4.el9_8 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.20.11-33.el9_7 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.20.11-34.el9_8 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions unaffected 0:21.1.3-5.el9_0 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions unaffected 0:1.20.11-13.el9_0 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions unaffected 0:1.11.0-22.el9_0.17 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions unaffected 0:21.1.3-10.el9_2 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions unaffected 0:1.20.11-20.el9_2 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions unaffected 0:1.12.0-14.el9_2.14 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support unaffected 0:1.20.11-28.el9_4 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support unaffected 0:22.1.9-8.el9_4 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support unaffected 0:1.13.1-8.el9_4.9 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support unaffected 0:1.20.11-33.el9_6 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support unaffected 0:23.2.7-6.el9_6 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support unaffected 0:1.14.1-10.el9_6 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 6 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2026:24341 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:11692 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20562 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:21699 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:21742 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20575 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:11656 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:19342 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/security/cve/CVE-2026-34001 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20590 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:21716 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:23496 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:11388 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20560 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:23254 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:10739 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com
access.redhat.com/errata/RHSA-2026:20576 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20547 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:19344 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:22424 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34001.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com
access.redhat.com/errata/RHSA-2026:23255 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20561 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20555 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:21741 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:21712 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:21718 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:11352 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:13414 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:11369 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20557 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20563 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20558 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:22456 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:21715 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:19125 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:19343 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank Jan-Niklas Sohn (TrendAI Zero Day Initiative) for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-03-25T07:00:05.329ZReported to Red Hat.
CNA2026-04-23T14:14:42.224ZMade public.
ADP2026-03-25T07:00:05.329ZReported to Red Hat.
ADP2026-04-23T14:14:42.224ZMade public.

Solutions

ADP: RHSA-2026:23496: Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION), Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)

ADP: RHSA-2026:22456: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)

ADP: RHSA-2026:20590: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)

ADP: RHSA-2026:20563: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)

ADP: RHSA-2026:11352: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)

ADP: RHSA-2026:19125: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)

ADP: RHSA-2026:13414: Red Hat Enterprise Linux AppStream (v. 8)

ADP: RHSA-2026:11692: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8)

ADP: RHSA-2026:11656: Red Hat Enterprise Linux AppStream (v. 8)

ADP: RHSA-2026:23254: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)

ADP: RHSA-2026:21715: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)

ADP: RHSA-2026:24341: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)

ADP: RHSA-2026:21718: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6)

ADP: RHSA-2026:21716: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6)

ADP: RHSA-2026:23255: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)

ADP: RHSA-2026:21742: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)

ADP: RHSA-2026:21712: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)

ADP: RHSA-2026:21741: Red Hat Enterprise Linux AppStream E4S (v.9.0)

ADP: RHSA-2026:21699: Red Hat Enterprise Linux AppStream E4S (v.9.0)

ADP: RHSA-2026:20562: Red Hat Enterprise Linux AppStream E4S (v.9.0)

ADP: RHSA-2026:20576: Red Hat Enterprise Linux AppStream E4S (v.9.2)

ADP: RHSA-2026:20557: Red Hat Enterprise Linux AppStream E4S (v.9.2)

ADP: RHSA-2026:20547: Red Hat Enterprise Linux AppStream E4S (v.9.2)

ADP: RHSA-2026:20575: Red Hat Enterprise Linux AppStream EUS (v.9.4)

ADP: RHSA-2026:20555: Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.4)

ADP: RHSA-2026:20560: Red Hat Enterprise Linux AppStream EUS (v.9.4)

ADP: RHSA-2026:22424: Red Hat Enterprise Linux AppStream EUS (v.9.6)

ADP: RHSA-2026:20558: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)

ADP: RHSA-2026:20561: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)

ADP: RHSA-2026:10739: Red Hat Enterprise Linux AppStream (v. 9)

ADP: RHSA-2026:11388: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)

ADP: RHSA-2026:11369: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)

ADP: RHSA-2026:19342: Red Hat Enterprise Linux AppStream (v. 9)

ADP: RHSA-2026:19343: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)

ADP: RHSA-2026:19344: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)

Workarounds

CNA: To mitigate this issue, restrict access to the X11 server to trusted users and networks. If the X.Org X server is not required, consider disabling or uninstalling it. For environments where the X server is essential, running X applications within a sandboxed environment can help reduce the attack surface.

ADP: To mitigate this issue, restrict access to the X11 server to trusted users and networks. If the X.Org X server is not required, consider disabling or uninstalling it. For environments where the X server is essential, running X applications within a sandboxed environment can help reduce the attack surface.

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