#VU125370 Heap-based buffer overflow in FreeRDP - CVE-2026-33984

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Main Vulnerability Database Vulnerabilities #VU125370

#VU125370 Heap-based buffer overflow in FreeRDP - CVE-2026-33984

Published: April 8, 2026


Vulnerability identifier: #VU125370
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-33984
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
FreeRDP
Software vendor:
FreeRDP

Description

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to a heap-based buffer overflow in resize_vbar_entry() in libfreerdp/codec/clear.c when processing ClearCodec band data from a malicious RDP server. A remote attacker can send crafted ClearCodec band data to execute arbitrary code.

User interaction is required to connect to a malicious RDP server, and exploitation depends on realloc failure under memory pressure.


Remediation

Install security update from vendor's website.

External links