CVE-2026-33986

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Source
https://cve.org/CVERecord?id=CVE-2026-33986
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33986.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33986
Aliases
  • GHSA-h6qw-wxvm-hf97
Downstream
Related
Published
2026-03-30T21:43:21Z
Modified
2026-08-12T16:25:02Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write
Details

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in yuv_ensure_buffer() in libfreerdp/codec/h264.c, h264->width and h264->height are updated before the reallocation loop. If any winpr_aligned_recalloc() call fails, the function returns FALSE but width/height are already inflated. This issue has been patched in version 3.24.2.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-122",
        "CWE-131"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33986.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "3.24.2"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
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
f6e43e208958140074ae9bb93cd0c9045a371c77
Database specific
Show details 
{
    "source": "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-2026-33986.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "172850258780086269431260710151986143315",
            "length": 1322
        },
        "id": "CVE-2026-33986-2d3fb466",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/freerdp/freerdp/commit/f6e43e208958140074ae9bb93cd0c9045a371c77",
        "target": {
            "file": "libfreerdp/codec/h264.c",
            "function": "yuv_ensure_buffer"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "74394165335505443325400846450578214993",
                "57000031411417770646776585790722478912",
                "61809315941507778020543086733847748815",
                "12234297497225349781847023638155668651",
                "284571293220291470971549570489460076496",
                "243274070205429467887542360603720301941",
                "252665451964816204409499113154037703003",
                "240522512309630831697827857464120036961",
                "63023319149774050960125992398873200987"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-33986-440bd98d",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/freerdp/freerdp/commit/f6e43e208958140074ae9bb93cd0c9045a371c77",
        "target": {
            "file": "libfreerdp/codec/h264.c"
        }
    }
]
vanir_signatures_modified 
"2026-08-12T16:25:02Z"