CVE-2026-91961

Description

FreeRDP before 3.31.0 contains a denial-of-service vulnerability in the URBDRC control-transfer request path that fails to validate OutputBufferSize before forwarding to the libusb backend. A malicious RDP server can send a control-transfer request with OutputBufferSize set to 65536, triggering a reachable assertion that terminates the client process.

CVSS Vector

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w9qg-g24r-77f6
• https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-urbdrc