Quick answers
- Is CVE-2026-121403 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-121403 being exploited in the wild.
- How severe is CVE-2026-121403?
- Medium severity, with a CVSS score of 4.3, published 3 November 2026.
- Which products and versions are affected?
- FreeRDP before 3.32.2.
- Is there a fix for CVE-2026-121403?
- Yes: fixed in 3.32.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-121403 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-121403?
- Check whether you run FreeRDP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 3.32.2
Technical details
A truncated IRP_MJ_CREATE request (20-byte header with zero-byte payload) is accepted by irp_new() but causes drive_process_irp_create() to return an error that silently terminates the drive worker thread. The channel error is not raised because drive_poll_run() exits without flagging failure. Subsequent IRPs posted by the malicious server accumulate unbounded in IrpQueue without a consumer, causing memory exhaustion. The vulnerability requires drive redirection to be enabled (default in many configurations) and a network-reachable malicious RDP server.
Affected products
- FreeRDP FreeRDP before 3.32.2
Timeline
- 2026-10-19: disclosed
- 2026-11-03: advisory