CVE-2025-62229: Use-After-Free (CVSS 7.3)

Description

A flaw was found in the X.Org X server and Xwayland when processing X11 Present extension notifications. Improper error handling during notification creation can leave dangling pointers that lead to a use-after-free condition. This can cause memory corruption or a crash, potentially allowing an attacker to execute arbitrary code or cause a denial of service.

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CVSS v3.1 Score

7.3

HIGH

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

Weakness Type (CWE)

CWE-416 Use After Free

References

Other References

https://access.redhat.com/errata/RHSA-2025:19432 https://access.redhat.com/errata/RHSA-2025:19433 https://access.redhat.com/errata/RHSA-2025:19434 https://access.redhat.com/errata/RHSA-2025:19435 https://access.redhat.com/errata/RHSA-2025:19489 https://access.redhat.com/errata/RHSA-2025:19623 https://access.redhat.com/errata/RHSA-2025:19909 https://access.redhat.com/errata/RHSA-2025:20958 https://access.redhat.com/errata/RHSA-2025:20960 https://access.redhat.com/errata/RHSA-2025:20961

Frequently Asked Questions

What is CVE-2025-62229? +

A flaw was found in the X.Org X server and Xwayland when processing X11 Present extension notifications. Improper error handling during notification creation can leave dangling pointers that lead to a use-after-free condition. This can cause memory corruption or a crash, potentially allowing an attacker to execute arbitrary code or cause a denial of service. It has a CVSS v3.1 base score of 7.3 (HIGH).

How severe is CVE-2025-62229? +

CVE-2025-62229 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2025-62229? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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