Xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access

7.8 CVSS

Vulnerability Description

An out-of-bounds memory access flaw was found in the X.Org server. This issue can be triggered when a device frozen by a sync grab is reattached to a different master device. This issue may lead to an application crash, local privilege escalation (if the server runs with extended privileges), or remote code execution in SSH X11 forwarding environments.

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:

Upstream acknowledges Jan-Niklas Sohn (Trend Micro Zero Day Initiative) as the original reporter.

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Affected Vendor

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Affected Software

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

Vulnerable Versions:

21.1.0, 0:1.1.0-25.el6_10.13, 0:1.20.4-27.el7_9, 0:1.8.0-31.el7_9, 0:1.13.1-2.el8_9.7, 0:1.20.11-22.el8, 0:21.1.3-15.el8, 0:1.9.0-15.el8_2.9, 0:1.11.0-8.el8_4.8, 0:1.12.0-6.el8_6.9, 0:1.12.0-15.el8_8.7, 0:1.13.1-3.el9_3.6, 0:1.20.11-24.el9, 0:22.1.9-5.el9, 0:1.11.0-22.el9_0.8, 0:1.12.0-14.el9_2.5