Memory leak vulnerability in the xmllint interactive shell command parser. The issue is caused by improper memory management when processing input lines that consist solely of whitespace characters. In this scenario, the allocated command buffer is not freed before continuing execution, resulting in a persistent memory leak. By repeatedly supplying large whitespace-only inputs, a local attacker can cause unbounded memory growth, eventually exhausting system resources and triggering an out-of-memory (OOM) condition. This flaw can be exploited without authentication but requires local access to the xmllint shell, leading to a denial-of-service condition.