Out-of-bounds read in FreeRDP - #VU146576
Published: September 1, 2026
Vulnerability identifier: #VU146576
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/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-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to out-of-bounds read in smartcard response decoders in libfreerdp/utils/smartcard_pack.c when processing smartcard device-I/O completion responses with oversized ATR lengths. A remote user can send a structurally valid smartcard response with an oversized ATR length to cause a denial of service.
The server must enable smartcard redirection and have an outstanding Status or GetStatusChange request.
Affected software
FreeRDP
Remediation
Install security update from vendor's website.
FreeRDP - update to 3.31.0