CVE-2026-56297 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-56297HIGH

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

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   H   N   N   N   L   L   H    8.3   .0036   29.3     —

AFFECTED
  Product  Versions     Fixed
  FreeRDP  unspecified  3.22.0

TIMELINE
  Jun 20  Reserved by VulnCheck
  Jul 8   EXPLOIT PUBLISHED — CVE-2026-56297 (FreeRDP). Public exploit reference added.
  Jul 8   Published (CNA: VulnCheck)

CWE-362 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 20, 2026	Reserved	Reserved by VulnCheck
July 8, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-56297 (FreeRDP). Public exploit reference added.
July 8, 2026	Published	Published (CNA: VulnCheck)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
FreeRDP	FreeRDP	—	—	3.22.0

Weaknesses

CWE-362

References (2)

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3mv2-5q57-2v8h [Exploit, Vendor Advisory]
https://www.vulncheck.com/advisories/freerdp-use-after-free-via-race-condition-in-drdynvc-channel-callback [Third Party Advisory]

Authoritative record: CVE-2026-56297 at cve.org

Vendors: freerdp

Weaknesses: CWE-362

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-56297 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.