CVE-2026-25941

FreeRDP is a free implementation of the Remote Desktop Protocol. Versions on the 2.x branch prior to to 2.11.8 and on the 3.x branch prior to 3.23.0 have an out-of-bounds read vulnerability in the FreeRDP client's RDPGFX channel that allows a malicious RDP server to read uninitialized heap memory by sending a crafted WIRETOSURFACE_2 PDU with a bitmapDataLength value larger than the actual data in the packet. This can lead to information disclosure or client crashes when a user connects to a malicious server. Versions 2.11.8 and 3.23.0 fix the issue.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125",
        "CWE-20"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25941.json"
}

References

Affected packages

Git / github.com/freerdp/freerdp

Affected ranges

Type

GIT

Repo

https://github.com/freerdp/freerdp

Events

Introduced

5ab2bed8749747b8e4b2ed431fd102bc726be684

Fixed

9b678b6d5a40ce01607d8c3b1b1416437c8416c4

Introduced

a34fa7c49d2a39aa49ace1d7bea9656912d8c7cb

Fixed

b933ae18d9ad2a1d73c610868fcc30eb61654070

Fixed

2e3b77e28ac6a398897d28ba464dcc5dfab9c9e2

Database specific

{
    "versions": [
        {
            "introduced": "2.0.0"
        },
        {
            "fixed": "2.11.8"
        },
        {
            "introduced": "3.0.0"
        },
        {
            "fixed": "3.23.0"
        }
    ]
}

Affected versions

2.*

2.0.0

2.1.0

2.1.1

2.1.2

2.10.0

2.11.0

2.11.1

2.11.2

2.11.3

2.11.4

2.11.5

2.11.6

2.11.7

2.2.0

2.3.0

2.3.1

2.3.2

2.4.1

2.5.0

2.6.0

2.6.1

2.7.0

2.8.0

2.8.1

2.9.0

3.*

3.0.0

3.1.0

3.2.0

3.3.0

3.4.0

3.5.0

3.5.1

Database specific

vanir_signatures_modified

"2026-04-11T03:29:11Z"

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-25941.json"

vanir_signatures

[
    {
        "target": {
            "function": "rdpgfx_recv_wire_to_surface_2_pdu",
            "file": "channels/rdpgfx/client/rdpgfx_main.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "length": 1720.0,
            "function_hash": "87785624444684630625403399873965558033"
        },
        "id": "CVE-2026-25941-09968854",
        "source": "https://github.com/freerdp/freerdp/commit/2e3b77e28ac6a398897d28ba464dcc5dfab9c9e2",
        "signature_type": "Function"
    },
    {
        "target": {
            "file": "channels/rdpgfx/client/rdpgfx_main.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "198606674677032849176492837790532723166",
                "278568999666518782215971555724612607818",
                "27072193264022785266947455296503428501",
                "274262194524544336846558719596308508606"
            ]
        },
        "id": "CVE-2026-25941-ff610600",
        "source": "https://github.com/freerdp/freerdp/commit/2e3b77e28ac6a398897d28ba464dcc5dfab9c9e2",
        "signature_type": "Line"
    }
]