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Permalink CVE-2026-23530

created 2 months, 4 weeks ago

FreeRDP has heap-buffer-overflow in planar_decompress_plane_rle

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

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-r4hv-852m-fq7p x_refsource_CONFIRM
https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/planar.c#L1689-L1696 x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/planar.c#L1713-L1716 x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/planar.c#L951-L953 x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0 x_refsource_MISC

Affected products

FreeRDP

==< 3.21.0

Matching in nixpkgs

pkgs.freerdp

Remote Desktop Protocol Client

nixos-25.11 3.17.2
- nixpkgs-25.11-darwin 3.17.2

pkgs.freerdpUnstable

Remote Desktop Protocol Client

nixos-unstable 3.16.0
- nixpkgs-unstable 3.16.0
- nixos-unstable-small 3.16.0

Package maintainers

@peterhoeg Peter Hoeg <peter@hoeg.com>