Use After Free
Radare2 versions prior to 5.6.8 is vulnerable to heap-use-after-free. This vulnerability is capable of inducing denial of service.
CWE-416 - Use After Free
Use-after-free (UaF) vulnerability occurs when the application is using a pointer to memory that has been freed. Any attempt to read/write to a buffer after it is de-allocated allows memory corruption, sensitive information exposure, and can potentially lead to arbitrary code execution.