A flaw was found in GNUPlot. A segmentation fault via IO_str_init_static_internal may jeopardize the environment.
This is fixed upstream with this commit: commit a5897feadc4be73b0ffd8458556c47117bd24d03 Author: Ethan A Merritt <merritt.edu> Date: Tue Mar 25 22:51:54 2025 -0700 hpgl: font name parsing overruns the string by one char if no comma is present in the font name. E.g. set term pcl set title "Title" font "sans" # no comma in font name plot x Bug 2781 Not yet released.