🛡️ CVE-2026-56297 — freerdp

🟠 CVSS 7.0 — High ⚠️ Exploit Public CWE-362 NVD
7.0
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability high.

Weakness class

CVE-2026-56297 is classified as CWE-362: Race Condition. Concurrent operations share state without proper synchronisation, so timing decides whether the result is correct.

Affected software

CVE-2026-56297 is recorded against 1 package.

  • freerdp (fixed in 3.22.0)

Timeline and source

Published on 8 July 2026 and last revised on 10 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

github.com
www.vulncheck.com
github.com

Details

Severity HIGH
CVSS Score 7.0
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
CWE CWE-362
Public Exploit ⚠️ Yes
Source NVD
Published 2026-07-08
Updated 2026-08-11
Modified 2026-07-10
Fix URL N/A

Affected Packages

Software From version Fixed in
freerdp — 3.22.0

Similar Threats

Exploit Protection

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CVE-2026-56297 carries CVSS 7.0 High rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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