CVE-2026-33983

| EUVD-2026-17227 MEDIUM
2026-03-30 GitHub_M
6.5
CVSS 3.1
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CVSS Vector

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

Lifecycle Timeline

4
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 30, 2026 - 22:15 vuln.today
EUVD ID Assigned
Mar 30, 2026 - 22:15 euvd
EUVD-2026-17227
CVE Published
Mar 30, 2026 - 21:42 nvd
MEDIUM 6.5

Tags

Integer Overflow Information Disclosure

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.

Analysis

FreeRDP versions prior to 3.24.2 contain an integer overflow vulnerability in the progressive_decompress_tile_upgrade() function that allows unauthenticated remote attackers to cause a denial of service through CPU exhaustion. When processing malformed Remote Desktop Protocol (RDP) streams, a wrapped integer value (247) is incorrectly used as a bit-shift exponent, triggering undefined behavior and creating an approximately 80 billion iteration loop that consumes CPU resources. …

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Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: 0

Vendor Status

Ubuntu

Priority: Medium
freerdp
Release Status Version
xenial needs-triage -
bionic needs-triage -
jammy DNE -
noble DNE -
questing DNE -
upstream needs-triage -
freerdp2
Release Status Version
bionic needs-triage -
focal needs-triage -
jammy needs-triage -
noble needs-triage -
questing DNE -
upstream needs-triage -
freerdp3
Release Status Version
jammy DNE -
noble needs-triage -
questing needs-triage -
upstream needs-triage -

Debian

freerdp2
Release Status Fixed Version Urgency
bullseye vulnerable 2.3.0+dfsg1-2+deb11u1 -
bullseye (security) vulnerable 2.3.0+dfsg1-2+deb11u3 -
bookworm vulnerable 2.11.7+dfsg1-6~deb12u1 -
(unstable) fixed (unfixed) -
freerdp3
Release Status Fixed Version Urgency
trixie vulnerable 3.15.0+dfsg-2.1 -
forky, sid fixed 3.24.2+dfsg-1 -
(unstable) fixed 3.24.2+dfsg-1 -

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CVE-2026-33983 vulnerability details – vuln.today
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