Use After Free Affecting freerdp3 package, versions <3.29.0+dfsg-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.33% (26th percentile)

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  • Snyk IDSNYK-DEBIAN14-FREERDP3-18505564
  • published2 Aug 2026
  • disclosed1 Aug 2026

Introduced: 1 Aug 2026

NewCVE-2026-67299  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:14 freerdp3 to version 3.29.0+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp3 package and not the freerdp3 package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message proxy for WINDOW_ICON_ORDER when AsyncUpdate is enabled (e.g. xfreerdp /async-update). In update_message_WindowIcon() a shallow CopyMemory() overwrites a freshly allocated lParam->iconInfo with the parser-owned windowIcon->iconInfo pointer. After the parser callback returns, update_recv_window_info_order() frees window_icon.iconInfo, but the queued async message still retains and later dispatches that stale pointer. A malicious or compromised RDP server sending a crafted RAIL Window Alternate Secondary Order with WINDOW_ORDER_ICON can trigger use-after-free, leading to memory corruption and client crash.

CVSS Base Scores

version 3.1