FreeRDP doublefree in xf_Pointer_New before 3.21.0 (UAF DoS)
CVE-2026-23883 Published on January 19, 2026

Heap-use-after-free in update_pointer_new
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, `xf_Pointer_New` frees `cursorPixels` on failure, then `pointer_free` calls `xf_Pointer_Free` and frees it again, triggering ASan UAF. A malicious server can trigger a clientside use after free, causing a crash (DoS) and potential heap corruption with codeexecution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.

NVD

Weakness Type

What is a Dangling pointer Vulnerability?

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

CVE-2026-23883 has been classified to as a Dangling pointer vulnerability or weakness.


Products Associated with CVE-2026-23883

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FreeRDP
 

Affected Versions

FreeRDP Version < 3.21.0 is affected by CVE-2026-23883

Exploit Probability

EPSS
0.18%
Percentile
39.23%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.