CVE-2026-33983

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only emits WLog_WARN, 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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425	Patch
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478	Patch Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:10709
https://access.redhat.com/errata/RHSA-2026:11332
https://access.redhat.com/errata/RHSA-2026:11333
https://access.redhat.com/errata/RHSA-2026:11336
https://access.redhat.com/errata/RHSA-2026:11649
https://access.redhat.com/errata/RHSA-2026:11651
https://access.redhat.com/errata/RHSA-2026:12359
https://access.redhat.com/errata/RHSA-2026:12388
https://access.redhat.com/errata/RHSA-2026:19033
https://access.redhat.com/errata/RHSA-2026:19349
https://access.redhat.com/errata/RHSA-2026:8457
https://access.redhat.com/errata/RHSA-2026:8458
https://access.redhat.com/errata/RHSA-2026:8945
https://access.redhat.com/errata/RHSA-2026:9656
https://access.redhat.com/security/cve/CVE-2026-33983
https://bugzilla.redhat.com/show_bug.cgi?id=2453220
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33983.json

Configurations

Configuration 1 (hide)

cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-30 22:16

Updated : 2026-07-15 02:20

NVD link : CVE-2026-33983

Mitre link : CVE-2026-33983

CVE.ORG link : CVE-2026-33983

JSON object : View

Products Affected

freerdp

freerdp

CWE

CWE-190

Integer Overflow or Wraparound

CWE-252

Unchecked Return Value

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{"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-190"}]}], "descriptions": [{"lang": "en", "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only emits WLog_WARN, 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."}, {"lang": "es", "value": "FreeRDP es una implementaci\u00f3n gratuita del Protocolo de Escritorio Remoto. Antes de la versi\u00f3n 3.24.2, progressive_decompress_tile_upgrade() detecta una discrepancia a trav\u00e9s de progressive_rfx_quant_cmp_equal() pero solo emite WLog_WARN, la ejecuci\u00f3n contin\u00faa. El valor envuelto (247) se utiliza como exponente de desplazamiento, causando un comportamiento indefinido y un bucle de aproximadamente 80 mil millones de iteraciones (DoS de CPU). Este problema ha sido parcheado en la versi\u00f3n 3.24.2."}], "lastModified": "2026-07-15T02:20:26.733", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "03FF152C-C651-4586-8958-1555D9797516", "versionEndExcluding": "3.24.2"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}