--- a/src/video/SDL_bmp.c	2012-01-19 14:30:06.000000000 +0800
+++ b/src/video/SDL_bmp.c	2019-04-22 11:29:33.990000000 +0800
@@ -296,6 +296,12 @@ SDL_Surface * SDL_LoadBMP_RW (SDL_RWops
 				}
 				*(bits+i) = (pixel>>shift);
 				pixel <<= ExpandBMP;
+				if ( bits[i] >= biClrUsed ) {
+					SDL_SetError(
+						"A BMP image contains a pixel with a color out of the palette");
+					was_error = SDL_TRUE;
+					goto done;
+				}
 			} }
 			break;
 
@@ -306,6 +312,16 @@ SDL_Surface * SDL_LoadBMP_RW (SDL_RWops
 				was_error = SDL_TRUE;
 				goto done;
 			}
+			if ( 8 == biBitCount && palette && biClrUsed < (1 << biBitCount ) ) {
+				for ( i=0; i<surface->w; ++i ) {
+					if ( bits[i] >= biClrUsed ) {
+						SDL_SetError(
+							"A BMP image contains a pixel with a color out of the palette");
+						was_error = SDL_TRUE;
+						goto done;
+					}
+				}
+			}
 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
 			/* Byte-swap the pixels if needed. Note that the 24bpp
 			   case has already been taken care of above. */
