CVE-2026-25959

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-25959
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25959.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-25959
Aliases
  • GHSA-78xg-v4p2-4w3c
Downstream
Related
Published
2026-02-25T20:36:09.791Z
Modified
2026-07-22T03:08:47.258582Z
Severity
  • 5.5 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
FreeRDP has heap-use-after-free in xf_cliprdr_provide_data_
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25959.json",
    "cwe_ids": [
        "CWE-416"
    ]
}
References

Affected packages

Git / github.com/freerdp/freerdp

Affected ranges

Type
GIT
Repo
https://github.com/freerdp/freerdp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b933ae18d9ad2a1d73c610868fcc30eb61654070
Fixed
d3e8b3b9365be96a4f11dda149d71b3287227d0a
Database specific 
{
    "cpe": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.23.0"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

1.*
1.0-beta1
1.0-beta2
1.0-beta4
1.0-beta5
1.0.0
1.0.1
1.1.0-beta+2013071101
1.1.0-beta1
1.1.0-beta1+android2
1.1.0-beta1+android3
1.1.0-beta1+android4
1.1.0-beta1+android5
1.1.0-beta1+ios1
1.1.0-beta1+ios2
1.1.0-beta1+ios3
1.1.0-beta1+ios4
1.2.0-beta1+android7
1.2.0-beta1+android9
2.*
2.0.0
2.0.0-beta1+android10
2.0.0-beta1+android11
2.0.0-rc0
2.0.0-rc1
2.0.0-rc2
2.0.0-rc3
2.0.0-rc4
3.*
3.0.0
3.0.0-beta1
3.0.0-beta2
3.0.0-beta3
3.0.0-beta4
3.0.0-rc0
3.1.0
3.2.0
3.3.0
3.4.0
3.5.0
3.5.1

Database specific

vanir_signatures_modified 
"2026-07-22T03:08:47Z"
vanir_signatures 
[
    {
        "target": {
            "file": "client/X11/xf_cliprdr.c"
        },
        "id": "CVE-2026-25959-7803699f",
        "digest": {
            "line_hashes": [
                "140187442299368263434464487330894772885",
                "138414563758307286353016829805703644136",
                "64915792215187213272029038669883516841",
                "303631537780894793780378424319007441785",
                "50838123530107035430764103371345706278",
                "252471813760665922971423900704102609899",
                "278964411990300373488973611312905197584",
                "110447101449085449817359703853628316774",
                "273834990880202002528811070108422013099",
                "169394077118920314481945336585393234686",
                "109544432708464506794807400843774955727",
                "310680480002467454795077775153489257612",
                "320627949626274304917194646124307956219"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/freerdp/freerdp/commit/d3e8b3b9365be96a4f11dda149d71b3287227d0a"
    },
    {
        "target": {
            "function": "xf_cliprdr_process_selection_request",
            "file": "client/X11/xf_cliprdr.c"
        },
        "id": "CVE-2026-25959-ea7d431c",
        "digest": {
            "function_hash": "282219038322477492494185331844569180582",
            "length": 2951.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/freerdp/freerdp/commit/d3e8b3b9365be96a4f11dda149d71b3287227d0a"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25959.json"