CVE-2026-33983

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Source
https://cve.org/CVERecord?id=CVE-2026-33983
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33983.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33983
Aliases
  • GHSA-4gfm-4p52-h478
Downstream
Related
Published
2026-03-30T21:42:27.798Z
Modified
2026-07-22T03:44:36.862962Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
FreeRDP: Progressive Codec Quant BYTE Underflow - UB + CPU DoS
Details

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressivedecompresstileupgrade() detects a mismatch via progressiverfxquantcmpequal() but only emits WLogWARN, execution continues. The wrapped value (247) is used as a shift exponent, causing undefined behavior and an approximately 80 billion iteration loop (CPU DoS). This issue has been patched in version 3.24.2.

Database specific 
{
    "cwe_ids": [
        "CWE-190",
        "CWE-252"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33983.json",
    "cna_assigner": "GitHub_M",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "3.24.2"
                }
            ]
        }
    ]
}
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
78188ab479c8e6eb9ba2475b3732c76b4bbe5425
Database specific 
{
    "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

vanir_signatures_modified 
"2026-07-22T03:44:36Z"
vanir_signatures 
[
    {
        "signature_type": "Line",
        "target": {
            "file": "libfreerdp/codec/progressive.c"
        },
        "deprecated": false,
        "source": "https://github.com/freerdp/freerdp/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425",
        "id": "CVE-2026-33983-982c8937",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "93353622505111390641882887844937277427",
                "233908802214677999810634991854501629448",
                "279142864844677305642716569359495253629",
                "77569140509167542282398447243129113926",
                "83612844996024105248664012484422011615",
                "49781137138012574405199941494173475843",
                "303170522966309767556167581485631193903",
                "117674432803128929237739529249738416465",
                "258303796643107187888805234840245563928",
                "95195163942263249254929860241644909034",
                "324452841881576761841371846305693526061",
                "241555397306320874230176152574148632892",
                "2140984073463181123878284469717546140",
                "189480764641963025008645612231610617666",
                "106305128971618163191092944166443280406",
                "228520105562675674535300842835957570250",
                "161063130164877359825491039384325625507",
                "334297928795778675320517208706143758436",
                "150500399394966192148632850450000736927",
                "153678473575359258165617762855493813694",
                "243477012013887053847528246786644999596",
                "252698890282748040335583485150070376558",
                "38545011161204013379981560391934922925"
            ],
            "threshold": 0.9
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33983.json"