Exam SPLK-2001 topic 1 question 41 discussion

Consider the following Python code snippet used in a Splunk add-on: if not os.path.exists(full_path): self.doAction(full_path, header) else: f = open(full_path) oldORnew = f.readline
().split(`,`) f.close()
An attacker could create a denial of service by causing an error in either the open() or readline() commands. What type of vulnerability is this?