CVE-2026-25959 — Use After Free in Freerdp

CWE-416 — Use After FreeCWE-825 — Expired Pointer Dereference7 documents7 sources
Severity
5.5MEDIUMNVD
EPSS
0.2%
top 64.24%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
FreerdpDebian Freerdp2Debian Freerdp3
Timeline
PublishedFeb 25
Latest updateMar 18

Description

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. Ver…

CVSS 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

Affected Packages4 packages

▶CVEListV5freerdp/freerdp< 3.23.0
▶NVDfreerdp/freerdp< 3.23.0
▶debiandebian/freerdp2< freerdp3 3.23.0+dfsg-1 (forky)
▶debiandebian/freerdp3< freerdp3 3.23.0+dfsg-1 (forky)

Patches

Patch: github.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

2
OSV
CVE-2026-25959: FreeRDP is a free implementation of the Remote Desktop Protocol↗2026-02-25
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CVEList
FreeRDP has heap-use-after-free in xf_cliprdr_provide_data_↗2026-02-25
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📋Vendor Advisories

3
Ubuntu
FreeRDP vulnerabilities↗2026-03-18
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Red Hat
freerdp: FreeRDP: Denial of Service via heap use-after-free in clipboard handling↗2026-02-25
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Debian
CVE-2026-25959: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-25959 Impact, Exploitability, and Mitigation Steps | Wiz↗
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