CVE-2026-22855

A heap based buffer overflow has been discovered in FreeRDP. This heap out-of-bounds read occurs in the smartcard SetAttrib path when cbAttrLen does not match the actual NDR buffer length.

Red Hat products in their default configuration employ Address Space Layout Randomization (ASLR) which drastically increases the complexity of the successful exploitation of this flaw.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.