diff -up libjpeg-turbo-1.5.3-build/libjpeg-turbo-1.5.3/rdppm.c.CVE-2020-13790p2of3 libjpeg-turbo-1.5.3-build/libjpeg-turbo-1.5.3/rdppm.c
--- libjpeg-turbo-1.5.3-build/libjpeg-turbo-1.5.3/rdppm.c.CVE-2020-13790p2of3	2025-05-06 17:38:26.175241021 +0200
+++ libjpeg-turbo-1.5.3-build/libjpeg-turbo-1.5.3/rdppm.c	2025-05-06 17:38:26.177038002 +0200
@@ -116,11 +116,10 @@ read_pbm_integer (j_compress_ptr cinfo,
   while ((ch = pbm_getc(infile)) >= '0' && ch <= '9') {
     val *= 10;
     val += ch - '0';
+    if (val > maxval)
+      ERREXIT(cinfo, JERR_PPM_OUTOFRANGE);
   }
 
-  if (val > maxval)
-    ERREXIT(cinfo, JERR_PPM_OUTOFRANGE);
-
   return val;
 }