CVE-2026-56297CWE-362

FreeRDP - Use-After-Free via Race Condition in DRDYNVC Channel Callback

High · published July 8, 2026

CVSS v4.0
8.3
EPSS
0%
Percentile
39.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.3 · HIGH
Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
EPSS
0.00466 · 39.3th percentile
Weakness
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Published
2026-07-08T13:49Z
EPSS history
Timeline
  • 08 JUL 13:49Z
    FreeRDP - Use-After-Free via Race Condition in DRDYNVC Channel Callback
    cvelistv5