Acknowledged
Created: Mar 20, 2026
Updated: Apr 13, 2026
Found In Version: 10.21.20.2
Severity: Standard
Applicable for: Wind River Linux LTS 21
Component/s: Userspace
XML::Parser versions through 2.47 for Perl has an off-by-one heap buffer overflow in st_serial_stack. In the case (stackptr == stacksize - 1), the stack will NOT be expanded. Then the new value will be written at location (++stackptr), which equals stacksize and therefore falls just outside the allocated buffer. The bug can be observed when parsing an XML file with very deep element nesting
