Vulnerability in Freerdp
CVE-2026-121408
FreeRDP before 3.32.2 contains a use-after-free in the urbdrc USB redirection channel because FindChannelById returns a channel pointer without a reference and the control-channel close path does not take the device manager's loading_lock. A malicious RDP server can send a control-channel CLOSE_REQUEST while the client announces a USB device, freeing the channel before the announcement thread reads channel->Write and crashing the client.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w897-ffhv-5j7g (vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/freerdp-before-3.32.2-use-after-free-via-usb-redir… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-121408?
- CVE-2026-121408 is a medium-severity vulnerability in Freerdp, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.3/10. Published 2026-11-03.
- How severe is CVE-2026-121408?
- Medium severity. CVSS v3 base score is 5.3 out of 10.