Code execution or crash via dangling notification pointer
Published Oct 30, 2025 · Updated Oct 30, 2025
Use-after-free in the X11 Present extension in Red Hat Enterprise Linux allows local users to execute code or crash the X server. During present_create_notifies processing, an error after a notification is linked leaves that structure referenced, and later notification teardown dereferences the freed object. An attacker needs low-privileged local access to an X server that exposes the Present extension; successful exploitation corrupts memory in the server process or interrupts the graphical session.
Summary
What happened
Use-after-free in the X11 Present extension in Red Hat Enterprise Linux allows local users to execute code or crash the X server. During present_create_notifies processing, an error after a notification is linked leaves that structure referenced, and later notification teardown dereferences the freed object. An attacker needs low-privileged local access to an X server that exposes the Present extension; successful exploitation corrupts memory in the server process or interrupts the graphical session.
The record
- CVE
- CVE-2025-62229
- Published
- Oct 30, 2025
- Updated
- Oct 30, 2025
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 6
- Classifications
- CWE-416
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 30, 2025CVE publishedPublication date reported by the CVE source.
- Oct 30, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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