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.
CVE-2026-121963
CVSS base score
5.9 (v3.1)
Severity
MEDIUM
Attack vector
Network
Weakness
CWE-362, CWE-416
Last modified
November 5, 2026
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
freerdp freerdp
References
- github.com Exploit, Vendor Advisory
- www.vulncheck.com Third Party Advisory
- github.com Exploit, Vendor Advisory