CVE-2026-111373
FreeRDP before 3.32.0 NULL Dereference via Zero-Length WebSocket Ping
- State
- Published
- Severity
- 6.9 Medium
- Published
- Oct 16, 2026
- Updated
- Oct 16, 2026
- Reserved
- Oct 15, 2026
Description
FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the websocket transport that allows a malicious gateway to crash clients by sending zero-length pings. When the payload length is zero, websocket_reply_pong passes a nullptr stream to websocket_reply_close, triggering an assertion failure that terminates the client process and causes denial of service.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | VulnCheck |
Weaknesses
- CWE-476 NULL Pointer Dereference
Affected Products
| Product | Versions |
|---|---|
FreeRDPFreeRDP |
|
References
- GitHub Security Advisory (GHSA-83g2-gf92-5c4g)vendor-advisory
- VulnCheck Advisory: FreeRDP before 3.32.0 NULL Dereference via Zero-Length WebSocket Pingthird-party-advisory
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