FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP clients using TS Gateway accept a server-controlled max_xmit_frag value in libfreerdp/core/gateway/rpc_bind.c without bounding it to the 4088-byte ReceiveFragment allocation. A malicious gateway can advertise 65535 and then send a response fragment of the same length, causing rpc_channel_read in libfreerdp/core/gateway/rpc.c to write up to 65535 bytes into the smaller ReceiveFragment buffer. This can crash the client and may permit code execution through attacker-controlled heap corruption. This issue is fixed in version 3.27.0.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/FreeRDP/FreeRDP/commit/a863ef1cf1cdabf9019280e5658f806e73bb50e8 Patch
- https://github.com/FreeRDP/FreeRDP/pull/12873 Issue Tracking, Patch
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7rp4-66mc-j9vx Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.7 · freerdpNVD modified 2026-10-26 11:10
Affected (CPE criteria) 1
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
References 4
- https://github.com/FreeRDP/FreeRDP/commit/a863ef1cf1cdabf9019280e5658f806e73bb50e8 Patch
- https://github.com/FreeRDP/FreeRDP/pull/12873 Issue Tracking, Patch
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0 Release Notes
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7rp4-66mc-j9vx Exploit, Vendor Advisory