Vulnerabilities CVE-2026-23883

CVE-2026-23883

High

Open

TLP:CLEAR

Heap-use-after-free in update_pointer_new

NVD CVE.org

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Description

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 client‑side use after free, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.

Details

CVSS Score: 7.7
EPSS Score ⓘ: 0.40%

33.2th percentile
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
Confidence: 90%
Published: Jan 19, 2026
Last Modified: Jul 15, 2026

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