CVE-2026-55192

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Source
https://cve.org/CVERecord?id=CVE-2026-55192
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-55192.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-55192
Aliases
  • GHSA-3mmf-qh4f-frm6
Downstream
Related
Published
2026-08-19T17:51:19.479Z
Modified
2026-08-21T08:10:12.471844Z
Severity
  • 7.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
FreeRDP: Out-of-bounds read in H.264 YUV-to-RGB conversion due to decoder/surface dimension mismatch
Details

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP H.264 decoder backends can return YUV planes sized from the bitstream without comparing the decoded width and height to the RDPGFX surface dimensions used to validate region rectangles. A malicious RDP server can provide an AVC420 or AVC444 bitstream whose decoded frame is smaller than the negotiated surface, causing yuv420contextdecode and the YUV-to-RGB conversion paths to read beyond the decoder-owned planes in libfreerdp/codec/h264.c and the selected H.264 backend. This can disclose client memory or crash the client. This issue is fixed in version 3.27.0.

Database specific 
{
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55192.json",
    "cna_assigner": "GitHub_M"
}
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
0cd45b70bb1fe6befd258ff64c46461947e99adb
Fixed
4f72b0979892352ff501e84d99832dc3bdc86a53
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.27.0"
        }
    ]
}

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/osv-test-cve-osv-conversion/osv-output/CVE-2026-55192.json"
vanir_signatures 
[
    {
        "signature_type": "Function",
        "source": "https://github.com/freerdp/freerdp/commit/0cd45b70bb1fe6befd258ff64c46461947e99adb",
        "deprecated": false,
        "digest": {
            "function_hash": "285632724602400137230242696387614869128",
            "length": 3907.0
        },
        "target": {
            "function": "mediacodec_decompress",
            "file": "libfreerdp/codec/h264_mediacodec.c"
        },
        "id": "CVE-2026-55192-080ac9a1",
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "source": "https://github.com/freerdp/freerdp/commit/0cd45b70bb1fe6befd258ff64c46461947e99adb",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "329323272531802623443389811262878676130",
                "15068140244995951115243974326937273775",
                "22721345583231481990848390301856785728",
                "106460977052395651933930975575300448133"
            ]
        },
        "target": {
            "file": "libfreerdp/codec/h264_mf.c"
        },
        "id": "CVE-2026-55192-3dd26e1e",
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "source": "https://github.com/freerdp/freerdp/commit/0cd45b70bb1fe6befd258ff64c46461947e99adb",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "25881490268620535056720489869189009473",
                "197893173409761184133565108049178691741",
                "205187246728630921141661124080469335045",
                "95832297398522994966762701540932390942"
            ]
        },
        "target": {
            "file": "libfreerdp/codec/h264_mediacodec.c"
        },
        "id": "CVE-2026-55192-4b165579",
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "source": "https://github.com/freerdp/freerdp/commit/0cd45b70bb1fe6befd258ff64c46461947e99adb",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "20870620842956037594280179850516770748",
                "218050204717777180179525238404943902636",
                "279788920829534451537208065299470460115"
            ]
        },
        "target": {
            "file": "libfreerdp/codec/h264_openh264.c"
        },
        "id": "CVE-2026-55192-b8d51546",
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "source": "https://github.com/freerdp/freerdp/commit/0cd45b70bb1fe6befd258ff64c46461947e99adb",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "58719563111234205608692959542276148053",
                "173050699751623155674030426688055797856",
                "47865235066721186079229959159384678549",
                "134738717273091422486609128869235720933"
            ]
        },
        "target": {
            "file": "libfreerdp/codec/h264_ffmpeg.c"
        },
        "id": "CVE-2026-55192-badd14e6",
        "signature_version": "v1"
    }
]
vanir_signatures_modified 
"2026-08-21T08:10:12Z"