CVE-2025-26600

HIGH
2025-02-25 [email protected]
7.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Patch Released
Apr 05, 2026 - 14:30 nvd
Patch available
Analysis Generated
Mar 28, 2026 - 18:28 vuln.today
CVE Published
Feb 25, 2025 - 16:15 nvd
HIGH 7.8

Tags

Use After Free Memory Corruption Information Disclosure

Description

A use-after-free flaw was found in X.Org and Xwayland. When a device is removed while still frozen, the events queued for that device remain while the device is freed. Replaying the events will cause a use-after-free.

Analysis

A use-after-free flaw was found in X.Org and Xwayland. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Technical Context

This vulnerability is classified as Use After Free (CWE-416), which allows attackers to access freed memory to execute arbitrary code or crash the application. A use-after-free flaw was found in X.Org and Xwayland. When a device is removed while still frozen, the events queued for that device remain while the device is freed. Replaying the events will cause a use-after-free. Affected products include: Tigervnc, X.Org X Server, X.Org Xwayland, Redhat Enterprise Linux.

Affected Products

Tigervnc, X.Org X Server, X.Org Xwayland, Redhat Enterprise Linux.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use smart pointers or garbage-collected languages. Set pointers to NULL after freeing. Enable memory sanitizers.

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +39
POC: 0

Vendor Status

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CVE-2025-26600 vulnerability details – vuln.today
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