Out-of-bounds write in FreeRDP - #VU131103
Published: May 12, 2026
Vulnerability identifier: #VU131103
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
FreeRDP
FreeRDP
Software vendor:
FreeRDP
FreeRDP
Description
The vulnerability allows a remote attacker to cause a denial of service and potentially execute arbitrary code.
The vulnerability exists due to out-of-bounds write in freerdp_bitmap_decompress_planar() and planar_decompress_plane_rle() in the planar bitmap decoder when decoding RLE planar data with a large destination stride and X destination coordinate that trigger the temp-buffer code path. A remote attacker can send specially crafted planar bitmap data to cause a denial of service and potentially execute arbitrary code.
No FreeRDP server or client is affected; the issue affects third-party implementations that use their own decoding system and utilize the FreeRDP planar decoder.
Remediation
Install security update from vendor's website.