FreeRDP 3.17.1 before 3.32.0 contains a heap buffer over-read vulnerability in DynvcTrackerHandleCreateBack of the freerdp-proxy DRDYNVC channel handler that allows malicious backend RDP servers to read heap memory out of bounds. Attackers can send a CREATE_REQUEST_PDU whose channel name lacks a NUL byte, causing an unbounded snprintf read that leaks memory into proxy logs or crashes the process.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g4wg-67xq-8q53 Exploit, Vendor Advisory
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g4wg-67xq-8q53 Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 4
- Cpes+1 CPE criteria (now 1)NVD modified 2026-10-21 14:17
- StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-21 14:17
- StatusAwaiting Analysis → Undergoing AnalysisNVD modified 2026-10-18 12:17
- First seenCVSS 6.9NVD modified 2026-10-14 20:10
Affected (CPE criteria) 1
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
References 3
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g4wg-67xq-8q53 Exploit, Vendor Advisory
- https://www.vulncheck.com/advisories/freerdp-3.17.1-before-3.32.0-heap-buffer-over-read-via-proxy-drdynvc-channel-name Third Party Advisory
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g4wg-67xq-8q53 Exploit, Vendor Advisory