Review reviewHigh

CVE-2025-62231

X.Org Xwayland, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION

A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a crash.

CVSS: 7.3
EPSS: 0.28%
CISA KEV: Not listed
Published: 2025.10.30

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.28%

Technical severityCVSS 7.3

Vulnerability overview

Affected product and versions

Product: X.Org Xwayland, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
Affected versions: < 21.1.19, < 24.1.9, >= 4.1.0 < 4.1.1.30, 4.1.2.0, >= 7.2.5 < 7.2.5.12, >= 7.3.2 < 7.3.3.3, 7.3.4, 11.0, 8.0, 9.0, 10.0, 8.2, 8.4, 8.6, 6.0, 7.0, 9.4, 8.8, 9.2
Fixed versions: 21.1.19, 24.1.9, 4.1.1.30, 7.2.5.12, 7.3.3.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that X.Org Xwayland, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
CWE: CWE-190