CVE-2026-121953 FreeRDP before 3.32.2 Use-After-Free via rdpgfx Dynamic Virtual Channel Close
CriticalCVSS 9.3
- Published
- Updated
- Exploit status
- No public exploit known
Description
FreeRDP before 3.32.2 has a use-after-free in the client's rdpgfx dynamic virtual channel: a duplicate-name channel with a new ChannelId overwrites the listener's single callback slot, which rdpgfx_on_close frees without clearing. A malicious RDP server can open and close such a channel, then send a PDU on the original channel to crash the client or potentially execute code.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| FreeRDP | < 3.32.2 | 3.32.2 |
| redhat/freerdp(Red Hat:enterprise_linux:10) | All versions | No fix listed |
| redhat/freerdp(Red Hat:rhel_els:7) | All versions | No fix listed |
| redhat/freerdp(Red Hat:enterprise_linux:8) | All versions | No fix listed |
| redhat/freerdp(Red Hat:enterprise_linux:9) | All versions | No fix listed |
References
- GitHub Security Advisory (GHSA-6wqx-rv3q-vcxp) exploit vendor-advisory
- VulnCheck Advisory: FreeRDP before 3.32.2 Use-After-Free via rdpgfx Dynamic Virtual Channel Close third-party-advisory
- Red Hat CVE page mitigation vendor-advisory
- Red Hat Bugzilla 2567941 issue-tracking
- www.cve.org
- nvd.nist.gov