Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the ClearCodec bands decode path when crafted band coordinates allow writes past the end of the destination surface buffer. A malicious server can trigger a client‑side heap buffer overflow, 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.

INFO

Published Date :

2026-01-19T17:09:55.715Z

Last Modified :

2026-01-20T14:42:31.717Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-23534 vulnerability.

Vendors Products
Freerdp
  • Freerdp
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-23534.

URL Resource
https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L878-L879 cve-icon cve-icon cve-icon
https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L883-L884 cve-icon cve-icon cve-icon
https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0 cve-icon cve-icon cve-icon
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3frr-mp8w-4599 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-23534 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-23534 cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact