libglxproto.c in OpenGL libglvnd bb06db5a was discovered to contain a segmentation violation via the function glXGetDrawableScreen(). NOTE: this is disputed because there are no common situations in which users require uninterrupted operation with an attacker-controller server.
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).