Improper handling of exceptional conditions in FreeRDP - #VU156175
Published: October 19, 2026
Vulnerability identifier: #VU156175
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-755
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service by aborting the process decoding a malformed PNG image.
The vulnerability exists due to improper handling of exceptional conditions in winpr_read_png_from_buffer() in winpr/libwinpr/utils/image.c when decoding malformed PNG content during clipboard format conversion. A local user can supply local clipboard PNG data containing truncation, a bad CRC, or corrupt IDAT data to trigger png_error(); because no setjmp handler is installed, libpng's default error handler calls abort() and terminates the process.
The vulnerable decoder requires a build with WINPR_UTILS_IMAGE_PNG enabled.
Affected software
FreeRDP
Remediation
Install security update from vendor's website.
FreeRDP - update to 3.32.2