CVE-2026-111373

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.

Score

CVSS 3.1 7.5 High

Status

Analyzed - disclosure@vulncheck.com

Published

2026-10-16

Last modified

2026-10-20

Weaknesses

CWE-476

Affected products

• Freerdp (Freerdp)

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-83g2-gf92-5c4g
• https://www.vulncheck.com/advisories/freerdp-before-3.32.0-null-dereference-via-zero-length-websocket-ping