CVE-2026-33983

MEDIUM EPSS 16.4%
Published Mar 30, 20263mo ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Mar 30, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
16.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-190 Integer Overflow or Wraparound Numeric Error
CWE-252

Affected Products 1

VendorProductVersionRange
freerdpfreerdp* <3.24.2

References 2

  • github.com https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425
    Patch
  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478
    PatchVendor Advisory

Remediation

  • github.com https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425
    Patch
  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478
    PatchVendor Advisory