CVE-2026-56297
FreeRDP - Use-After-Free via Race Condition in DRDYNVC Channel Callback
CVSS Score
7.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-362 |
| Vendor | freerdp |
| Product | freerdp |
| Published | Jul 8, 2026 |
| Last Updated | Jul 8, 2026 |
Stay Ahead of the Next One
Get instant alerts for freerdp freerdp
Be the first to know when new high vulnerabilities affecting freerdp freerdp are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Affected Versions
FreeRDP / FreeRDP
0 < 3.22.0
References
Credits
🔍 jeremylaratro