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CVE-2026-23534

FreeRDP has heap-buffer-overflow in clear_decompress_bands_data PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
FreeRDP / FreeRDPaffected < 3.21.0

CWE

CWE-122

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

redhat-SADP

A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. A malicious server can trigger a client-side heap buffer overflow in the ClearCodec bands decode path. This vulnerability, caused by crafted band coordinates, allows writes past the end of the destination surface buffer. Successful exploitation can lead to a crash, resulting in a denial of service (DoS), and potentially arbitrary code execution.