diff --git a/‎crypto/x509/x509_vfy.c‎
Lines changed: 2 additions & 0 deletions b/‎crypto/x509/x509_vfy.c‎
Lines changed: 2 additions & 0 deletions
@@ -1308,6 +1308,8 @@ static int check_delta_base(X509_CRL *delta, X509_CRL *base)
     if (ASN1_INTEGER_cmp(delta->base_crl_number, base->crl_number) > 0)
         return 0;
     /* Delta CRL number must exceed full CRL number */
+    if (delta->crl_number == NULL)
+        return 0;
     return ASN1_INTEGER_cmp(delta->crl_number, base->crl_number) > 0;
 }
Original file line number	Diff line number	Diff line change
`@@ -1308,6 +1308,8 @@ static int check_delta_base(X509_CRL delta, X509_CRL base)`
`1308`	`1308`	`if (ASN1_INTEGER_cmp(delta->base_crl_number, base->crl_number) > 0)`
`1309`	`1309`	`return 0;`
`1310`	`1310`	`/* Delta CRL number must exceed full CRL number */`
	`1311`	`+ if (delta->crl_number == NULL)`
	`1312`	`+ return 0;`
`1311`	`1313`	`return ASN1_INTEGER_cmp(delta->crl_number, base->crl_number) > 0;`
`1312`	`1314`	`}`
`1313`	`1315`