Vulnerability · Published Oct 16, 2026 · Assigned by VulnCheck

CVE-2026-111373FreeRDP before 3.32.0 NULL Dereference via Zero-Length WebSocket Ping

Medium 5.3

In plain English

A medium-severity null pointer dereference in FreeRDP from FreeRDP. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 79.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-111373
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-111373
Debian:14	freerdp3	3.32.0+dfsg-1	DEBIAN-CVE-2026-111373
Ubuntu:22.04:LTS	freerdp2	no fix listed	UBUNTU-CVE-2026-111373
Ubuntu:24.04:LTS	freerdp3	3.32.0+dfsg-0ubuntu0.24.04.1	UBUNTU-CVE-2026-111373
Ubuntu:26.04:LTS	freerdp3	3.32.0+dfsg-0ubuntu0.26.04.1	UBUNTU-CVE-2026-111373

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	0 – before 3.32.0

Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

GitHub Security Advisory (GHSA-83g2-gf92-5c4g) vendor-advisory
VulnCheck Advisory: FreeRDP before 3.32.0 NULL Dereference via Zero-Length WebSocket Ping third-party-advisory