Vulnerability in FreeRDP

[ Description ]Official description

FreeRDP before 3.32.1 contains a heap-based buffer overflow in the server-side rdpsnd channel because an integer wraparound in rdpsnd_server_select_format() DVI_ADPCM block-alignment arithmetic bypasses validation. A malicious RDP client can send two SNDC_FORMATS PDUs with an nBlockAlign too small for nChannels, causing an unbounded heap write during server audio playback, potentially enabling code execution.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund27 Sep 2026WID-SEC-2026-3603

  FreeRDP: Multiple vulnerabilities Translated from German

  CVE-2026-114042CVE-2026-114041CVE-2026-114043+3 more CVEs

[ References ]References

• github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3m9q-g533-rqjq
• www.vulncheck.com/advisories/freerdp-before-3.32.1-heap-buffer-overflow-via-rdpsnd-serv…