CVE-2026-25959 (GCVE-0-2026-25959)

Vulnerability from cvelistv5 – Published: 2026-02-25 20:36 – Updated: 2026-02-26 15:52
VLAI
Title
FreeRDP has heap-use-after-free in xf_cliprdr_provide_data_
Summary
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.
Severity
5.5 (Medium)
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
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-26 15:52 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
FreeRDP FreeRDP Affected: < 3.23.0
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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        "id": "CVE-2026-25959",
        "lastModified": "2026-06-17T10:25:29.627",
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                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
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                "valueDensity": "NOT_DEFINED",
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                "vulnerabilityResponseEffort": "NOT_DEFINED"
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      "cve": "CVE-2026-25959",
      "id": "CVE-2026-25959",
      "initial_release_date": "2026-02-25T20:36:09.791000+00:00",
      "product_status:known_affected": "31",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "freerdp: FreeRDP: Denial of Service via heap use-after-free in clipboard handling",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25959.json",
      "version": "3"
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      "current_release_date": "2026-09-11T01:34:48Z",
      "cve": "CVE-2026-25959",
      "id": "CVE-2026-25959",
      "initial_release_date": "2026-02-28T00:24:57Z",
      "product_status:known_affected": "75",
      "product_status:recommended": "117",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-25959",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-25959.json",
      "version": "10"
    }
  }
}



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