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CVE-2026-23530

FreeRDP has heap-buffer-overflow in planar_decompress_plane_rle PUBLISHED

Description (CNA)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0,`freerdp_bitmap_decompress_planar` does not validate `nSrcWidth`/`nSrcHeight` against `planar->maxWidth`/`maxHeight` before RLE decode. 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. This vulnerability occurs because the `freerdp_bitmap_decompress_planar` function does not properly validate bitmap dimensions when decompressing planar bitmap data. A malicious server can exploit this by sending specially crafted bitmap data, leading to a client-side heap buffer overflow. This can cause a crash (Denial of Service) and potentially allow for arbitrary code execution on the client system.