Vulnerability · Published Nov 4, 2026 · Assigned by VulnCheck

CVE-2026-121963FreeRDP before 3.32.2 Use-After-Free via Dynamic rdpsnd Channel Close

Medium 5.9

In plain English

A medium-severity race condition in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.3%top 75.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

FreeRDP before 3.32.2 contains a use-after-free vulnerability in the asynchronous dynamic rdpsnd channel that allows malicious RDP servers to trigger freed callback access by closing the channel with queued audio PDUs. Attackers can send a training PDU then close the channel so the playback thread reads the freed callback in rdpsnd_virtual_channel_write, crashing the client.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-121963
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-121963
Debian:14	freerdp3	3.32.2+dfsg-1	DEBIAN-CVE-2026-121963

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	0 – before 3.32.2

Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-cx9c-q4jc-wm6c) vendor-advisory
VulnCheck Advisory: FreeRDP before 3.32.2 Use-After-Free via Dynamic rdpsnd Channel Close third-party-advisory