CVE-2026-23530

HIGH7.7

FreeRDP has heap-buffer-overflow in planar_decompress_plane_rle

Published Jan 19, 2026

Modified 1 months ago

Details

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.

References

WEB

https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/planar.c#L1689-L1696

WEB

https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/planar.c#L1713-L1716

WEB

https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/planar.c#L951-L953

WEB

https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0

WEB

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-r4hv-852m-fq7p

ADVISORY