Use After Free Affecting freerdp3 package, versions <3.23.0+dfsg-1


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.57% (43rd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FREERDP3-15352320
  • published26 Feb 2026
  • disclosed25 Feb 2026

Introduced: 25 Feb 2026

CVE-2026-25959  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:unstable freerdp3 to version 3.23.0+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:unstable relevant fixed versions and status.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, xf_cliprdr_provide_data_ passes freed pDstData to XChangeProperty because the cliprdr channel thread calls xf_cliprdr_server_format_data_response which converts and uses the clipboard data without holding any lock, while the X11 event thread concurrently calls xf_cliprdr_clear_cached_dataHashTable_Clear which frees the same data via xf_cached_data_free, triggering a heap use after free. Version 3.23.0 fixes the issue.

CVSS Base Scores

version 3.1