Reachable assertion in FreeRDP - #VU152392
Published: September 28, 2026
Vulnerability identifier: #VU152392
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a reachable assertion in the urb_isoch_transfer IN transfer path when processing a malicious RDP server's USB redirection request with an oversized OutputBufferSize value. A remote attacker can send a crafted TS_URB_ISOCH_TRANSFER request to cause a denial of service.
Exploitation requires the USB redirection channel (URBDRC) and no user interaction beyond connecting to the server.
Affected software
FreeRDP
Remediation
Install security update from vendor's website.
FreeRDP - update to 3.32.1