Out-of-bounds read in FreeRDP - #VU146589
Published: September 1, 2026
Vulnerability identifier: #VU146589
CSH Severity: Medium
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information and cause a denial of service.
The vulnerability exists due to out-of-bounds read in general_ChromaV1ToYUV444 in the FreeRDP primitives library when processing a crafted RFX_AVC444_BITMAP_STREAM from a malicious server. A remote attacker can send a specially crafted bitmap stream to disclose sensitive information and cause a denial of service.
User interaction is required because the victim must connect to the malicious RDP server. The issue affects the server-to-client direction and is duplicated in the generic, NEON, and SSE implementations.
Affected software
FreeRDP
Remediation
Install security update from vendor's website.
FreeRDP - update to 3.31.0