EUVD-2026-17233

| CVE-2026-33986 HIGH
2026-03-30 GitHub_M
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
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-2026-17233
CVE Published
Mar 30, 2026 - 21:43 nvd
HIGH 7.5

Tags

Heap Overflow Buffer Overflow

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in yuv_ensure_buffer() in libfreerdp/codec/h264.c, h264->width and h264->height are updated before the reallocation loop. If any winpr_aligned_recalloc() call fails, the function returns FALSE but width/height are already inflated. This issue has been patched in version 3.24.2.

Analysis

Heap buffer overflow in FreeRDP's H.264 YUV decoder (versions before 3.24.2) allows remote attackers to potentially achieve code execution via specially crafted RDP sessions. The vulnerability stems from premature dimension updates in yuv_ensure_buffer() that persist when memory reallocation fails, creating exploitable memory corruption conditions. …

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Remediation

Within 24 hours: Inventory all systems running FreeRDP versions before 3.24.2 using software asset tools or package managers (rpm/dpkg queries). Within 7 days: Isolate or restrict RDP access from untrusted sources via firewall rules; notify users to avoid connecting to unverified RDP servers. …

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Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +38
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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EUVD-2026-17233 vulnerability details – vuln.today
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