Code execution via freed global root cursor
Published Feb 25, 2025 · Updated Jun 29, 2026
Use-after-free in X.Org X Server and Xwayland allows local users with X client access to crash the server or execute code. A client can free the root cursor while the server retains it in a global variable, leaving later cursor operations to dereference freed memory. The attacker must already be able to connect as a local X client; successful exploitation can corrupt the server process, disclose or alter its data, or interrupt the graphical session.
Summary
What happened
Use-after-free in X.Org X Server and Xwayland allows local users with X client access to crash the server or execute code. A client can free the root cursor while the server retains it in a global variable, leaving later cursor operations to dereference freed memory. The attacker must already be able to connect as a local X client; successful exploitation can corrupt the server process, disclose or alter its data, or interrupt the graphical session.
The record
- CVE
- CVE-2025-26594
- Published
- Feb 25, 2025
- Updated
- Jun 29, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
- Classifications
- CWE-416
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 25, 2025CVE publishedPublication date reported by the CVE source.
- Jun 29, 2026Record 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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