Vulnerability Description
FreeRDP before 3.22.0 contains a use-after-free vulnerability in dvcman_channel_close and dvcman_call_on_receive due to improper synchronization of channel_callback access. A malicious RDP server can trigger a race condition by sending DYNVC_DATA and DYNVC_CLOSE messages concurrently, causing heap-use-after-free in the drdynvc client thread and potentially enabling remote code execution or denial of service.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Freerdp | Freerdp | < 3.22.0 |
Related Weaknesses (CWE)
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3mv2-5q57-2v8hExploitVendor Advisory
- https://www.vulncheck.com/advisories/freerdp-use-after-free-via-race-condition-iThird Party Advisory
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3mv2-5q57-2v8hExploitVendor Advisory
FAQ
What is CVE-2026-56297?
CVE-2026-56297 is a vulnerability with a CVSS score of 7.0 (HIGH). FreeRDP before 3.22.0 contains a use-after-free vulnerability in dvcman_channel_close and dvcman_call_on_receive due to improper synchronization of channel_callback access. A malicious RDP server can ...
How severe is CVE-2026-56297?
CVE-2026-56297 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56297?
Check the references section above for vendor advisories and patch information. Affected products include: Freerdp Freerdp.