Xorg: xwayland: use-after-free in xkb client resource removal

7.3 CVSS

Vulnerability Description

A flaw was discovered in the X.Org X server’s X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memory corruption or a crash when affected clients disconnect.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Red Hat would like to thank Jan-Niklas Sohn (Trend Micro Zero Day Initiative) for reporting this issue.

References

More from X.Org

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CVE-2025-62231

Xorg: xmayland: value overflow in xkbsetcompatmap()

High 7.3

CVE-2025-62229

Xorg: xmayland: use-after-free in xpresentnotify structure creation

High 7.3

CVE-2025-49180

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in x resize, rotate and reflect (randr) extension

High 7.8

CVE-2025-49179

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in x record extension

High 7.3

CVE-2025-49178

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: unprocessed client request due to bytes to ignore

Medium 5.5

Affected Vendor

X.Org

View all reports →

Affected Software

Xwayland, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Telecommunications Update Service, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Enterprise Linux 6

Vulnerable Versions:

0, 0:24.1.5-5.el10_0, 0:24.1.5-5.el10_1, 0:1.1.0-25.el6_10.15, 0:1.20.4-33.el7_9, 0:1.8.0-36.el7_9.3, 0:21.1.3-19.el8_10, 0:1.20.11-27.el8_10, 0:1.15.0-8.el8_10, 0:1.9.0-15.el8_2.15, 0:1.20.6-5.el8_2, 0:1.11.0-8.el8_4.14, 0:1.20.10-3.el8_4, 0:1.12.0-6.el8_6.15, 0:1.20.11-6.el8_6, 0:21.1.3-2.el8_6.5, 0:1.12.0-15.el8_8.16, 0:1.20.11-17.el8_8, 0:21.1.3-12.el8_8, 0:1.20.11-32.el9_6, 0:1.14.1-9.el9_6, 0:23.2.7-5.el9_6, 0:1.15.0-6.el9_7, 0:23.2.7-5.el9_7, 0:1.20.11-32.el9_7, 0:1.11.0-22.el9_0.16, 0:1.20.11-12.el9_0, 0:21.1.3-4.el9_0, 0:1.12.0-14.el9_2.13, 0:1.20.11-19.el9_2, 0:21.1.3-9.el9_2, 0:1.13.1-8.el9_4.8, 0:1.20.11-27.el9_4, 0:22.1.9-7.el9_4