Vulnerability · Published Nov 4, 2026 · Assigned by VulnCheck

CVE-2026-121953FreeRDP before 3.32.2 Use-After-Free via rdpgfx Dynamic Virtual Channel Close

Critical 9.8

In plain English

A critical-severity use-after-free in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.6%top 53.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

FreeRDP before 3.32.2 has a use-after-free in the client's rdpgfx dynamic virtual channel: a duplicate-name channel with a new ChannelId overwrites the listener's single callback slot, which rdpgfx_on_close frees without clearing. A malicious RDP server can open and close such a channel, then send a PDU on the original channel to crash the client or potentially execute code.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-121953
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-121953
Debian:14	freerdp3	3.32.2+dfsg-1	DEBIAN-CVE-2026-121953

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	0 – before 3.32.2

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-6wqx-rv3q-vcxp) vendor-advisory
VulnCheck Advisory: FreeRDP before 3.32.2 Use-After-Free via rdpgfx Dynamic Virtual Channel Close third-party-advisory