1 files changed, 4 insertions, 0 deletions
diff --git a/src/ltc/pk/asn1/der/short_integer/der_decode_short_integer.c b/src/ltc/pk/asn1/der/short_integer/der_decode_short_integer.c
index e596e072..e00702d1 100644
--- a/src/ltc/pk/asn1/der/short_integer/der_decode_short_integer.c
+++ b/src/ltc/pk/asn1/der/short_integer/der_decode_short_integer.c
@@ -42,6 +42,10 @@ int der_decode_short_integer(const unsigned char *in, unsigned long inlen, unsig
       return CRYPT_INVALID_PACKET;
    }
 
+   if (len > sizeof(unsigned long)) {
+      return CRYPT_OVERFLOW;
+   }
+
    /* read number */
    y = 0;
    while (len--) {