CVE-2026-63652

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Source
https://cve.org/CVERecord?id=CVE-2026-63652
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63652.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-63652
Aliases
  • GHSA-9g22-w2gr-vcmp
Downstream
Related
Published
2026-08-19T17:59:07Z
Modified
2026-09-11T08:36:39Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
FreeRDP: Double-free of `client_formats` in the rdpsnd server channel on a malformed Client Audio Formats PDU
Details

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, rdpsnd_server_recv_formats in channels/rdpsnd/server/rdpsnd_main.c frees context->client_formats on a malformed Client Audio Formats PDU without clearing the owning pointer or num_client_formats. An authenticated RDP client can trigger an error such as a cbSize larger than the remaining record, leave the dangling pointer in the server context, and cause rdpsnd_server_context_free to free the same allocation again at session teardown. This reliably terminates the server and can create allocator-dependent heap corruption. This issue is fixed in version 3.28.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-415"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63652.json"
}
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
caf653c0ba1c75ec8f298d1baa59770102a5d14c
Fixed
5370fb26fbf034ecd11d3026b6ad639b5fff493f
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.28.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "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

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63652.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "17760755864182547232931268987016362264",
            "length": 446
        },
        "id": "CVE-2026-63652-23318b48",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/freerdp/freerdp/commit/caf653c0ba1c75ec8f298d1baa59770102a5d14c",
        "target": {
            "file": "channels/rdpsnd/server/rdpsnd_main.c",
            "function": "rdpsnd_server_context_free"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "277943994472165369575933298658332714041",
            "length": 2667
        },
        "id": "CVE-2026-63652-2cd7f289",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/freerdp/freerdp/commit/caf653c0ba1c75ec8f298d1baa59770102a5d14c",
        "target": {
            "file": "channels/rdpsnd/server/rdpsnd_main.c",
            "function": "rdpsnd_server_recv_formats"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
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            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-63652-c49c7a41",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/freerdp/freerdp/commit/caf653c0ba1c75ec8f298d1baa59770102a5d14c",
        "target": {
            "file": "channels/rdpsnd/server/rdpsnd_main.c"
        }
    }
]
vanir_signatures_modified 
"2026-09-11T08:36:39Z"