CVE-2026-24683
Analyzed Analyzed - Analysis Complete
Use-After-Free in FreeRDP ainput_send_input_event Causes Crash

Publication date: 2026-02-09

Last updated on: 2026-02-10

Assigner: GitHub, Inc.

Description
FreeRDP is a free implementation of the Remote Desktop Protocol. ainput_send_input_event caches channel_callback in a local variable and later uses it without synchronization; a concurrent channel close can free or reinitialize the callback, leading to a use after free. Prior to 3.22.0, This vulnerability is fixed in 3.22.0.
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Meta Information
Published
2026-02-09
Last Modified
2026-02-10
Generated
2026-06-16
AI Q&A
2026-02-09
EPSS Evaluated
2026-06-14
NVD
CVE-2026-24683
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
freerdp freerdp to 3.22.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Executive Summary

This vulnerability exists in FreeRDP, a free implementation of the Remote Desktop Protocol. The function ainput_send_input_event caches a channel_callback in a local variable and later uses it without proper synchronization. If a channel is closed concurrently, the callback may be freed or reinitialized while still in use, leading to a use-after-free condition.

This issue was present prior to version 3.22.0 and has been fixed in version 3.22.0.

Impact Analysis

The use-after-free vulnerability can lead to undefined behavior such as application crashes, memory corruption, or potentially arbitrary code execution. Because the vulnerability occurs without requiring privileges or user interaction, it can be exploited remotely, posing a high risk to affected systems.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, you should upgrade FreeRDP to version 3.22.0 or later, as the issue is fixed starting from that version.

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