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Untriaged

Permalink CVE-2026-23732

created 2 months, 4 weeks ago

FreeRDP has heap-buffer-overflow in Glyph_Alloc

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, FastGlyph parsing trusts `cbData`/remaining length and never validates against the minimum size implied by `cx/cy`. A malicious server can trigger a client‑side global buffer overflow, causing a crash (DoS). Version 3.21.0 contains a patch for the issue.

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7qxp-j2fj-c3pp exploitx_refsource_CONFIRM
https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/cache/glyph.c#L463-L480 x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/codec/color.c#L261-L277 x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/core/graphics.c#L138 x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/core/orders.c#L2186C17-L2199 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>