VDB-354266 · CVE-2026-33983 · EUVD-2026-17227

FreeRDP up to 3.24.1 progressive_decompress_tile_upgrade integer overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in FreeRDP up to 3.24.1. Affected by this vulnerability is the function progressive_decompress_tile_upgrade. Such manipulation leads to integer overflow. This vulnerability is documented as CVE-2026-33983. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in FreeRDP up to 3.24.1. It has been rated as problematic. Affected by this issue is the function progressive_decompress_tile_upgrade. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-33983 since 03/24/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 306291 (Amazon Linux 2 : freerdp, --advisory ALAS2-2026-3238 (ALAS-2026-3238)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.24.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (306291), EUVD (EUVD-2026-17227) and CERT Bund (WID-SEC-2026-0880). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

Amazon Linux 2
Red Hat Enterprise Linux
Fedora Linux
SUSE Linux
Oracle Linux
SUSE openSUSE
RESF Rocky Linux
Open Source FreeRDP

Productinfo

Type

Remote Access Software

Name

FreeRDP

Version

License

open-source

Website

Product: https://github.com/FreeRDP/FreeRDP/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 306291
Nessus Name: Amazon Linux 2 : freerdp, --advisory ALAS2-2026-3238 (ALAS-2026-3238)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreeRDP 3.24.2

Timelineinfo

03/24/2026 CVE reserved
03/30/2026 +6 days VulDB entry created
03/31/2026 +0 days Advisory disclosed
07/02/2026 +93 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-33983 (🔒)
GCVE (CVE): GCVE-0-2026-33983
GCVE (VulDB): GCVE-100-354266
EUVD: 🔒
CERT Bund: WID-SEC-2026-0880 - FreeRDP: Mehrere Schwachstellen

Entryinfo

Created: 03/31/2026 00:17
Updated: 07/02/2026 02:38
Changes: 03/31/2026 00:17 (63), 03/31/2026 03:38 (1), 04/14/2026 17:04 (2), 04/18/2026 20:53 (7), 04/20/2026 14:00 (1), 05/13/2026 20:12 (1), 07/02/2026 02:38 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.