Quick answers
- Is CVE-2026-121953 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-121953 being exploited in the wild.
- How severe is CVE-2026-121953?
- Critical severity, with a CVSS score of 9.8, published 4 November 2026.
- Which products and versions are affected?
- FreeRDP before 3.32.2.
- Is there a fix for CVE-2026-121953?
- 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-2026-121953 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-121953?
- 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 use-after-free in the rdpgfx dynamic virtual channel handler occurs when a malicious RDP server creates a second channel with a duplicate name but different ChannelId, overwriting the listener's callback slot. When the second channel is closed, the callback is freed without being cleared, leaving a dangling pointer. Subsequent PDUs on the original channel dereference the freed memory through an unchecked pointer. Attack requires a completed RDP handshake with an attacker-controlled server; no user interaction needed.
Affected products
- FreeRDP FreeRDP before 3.32.2
Timeline
- 2026-10-20: advisory: GitHub Security Advisory GHSA-6wqx-rv3q-vcxp published
- 2026-11-04: disclosed