--- a/src/video/SDL_bmp.c	Sun Jan 13 15:27:50 2019 +0100
+++ b/src/video/SDL_bmp.c	Mon Feb 18 07:48:23 2019 -0800
@@ -233,6 +233,10 @@
 	if ( palette ) {
 		if ( biClrUsed == 0 ) {
 			biClrUsed = 1 << biBitCount;
+		} else if ( biClrUsed > (1 << biBitCount) ) {
+			SDL_SetError("BMP file has an invalid number of colors");
+			was_error = SDL_TRUE;
+			goto done;
 		}
 		if ( biSize == 12 ) {
 			for ( i = 0; i < (int)biClrUsed; ++i ) {