CVE-2026-25959CWE-416

FreeRDP has heap-use-after-free in xf_cliprdr_provide_data_

Medium · published February 25, 2026

CVSS v4.0
5.5
EPSS
1%
Percentile
59.9
In the wild
Unconfirmed
What it is

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_data` → `HashTable_Clear` which frees the same data via `xf_cached_data_free`, triggering a heap use after free. Version 3.23.0 fixes the issue.

The record
Technical detail
CVSS v4.0
5.5 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00922 · 59.9th percentile
Weakness
CWE-416 · Use After Free
Published
2026-02-25T20:36Z
EPSS history
Timeline
  • 25 FEB 20:36Z
    FreeRDP has heap-use-after-free in xf_cliprdr_provide_data_
    cvelistv5