A Use After Free vulnerability in the radare2 gdbr component allows for potential denial of service attacks via malicious input.

This is a Use After Free vulnerability (CWE-416) triggered during the processing of the gdbr pids list. The flaw allows an unauthenticated attacker to cause an application-level denial of service by triggering memory corruption.

The ability to crash a security analysis tool like radare2 can disrupt incident response and reverse engineering workflows. While the primary impact is a denial of service (system availability), the severity is elevated due to the nature of the tool as a security utility. The CVSS score of 7.5 reflects the potential for significant operational disruption.

Immediate Action: Apply the upstream fix provided in commit c213ad6894a1eb9086ac8bf5fae35757e9e1683c by updating to the latest development version or applying the patch.

Proactive Monitoring: Monitor logs for crashes or unexpected termination of radare2 processes when interacting with remote debugging targets.

Compensating Controls: Limit access to debugging interfaces and ensure that radare2 is only executed in isolated, sandboxed environments when processing untrusted binaries.

Public Exploit Available: Unknown

Users of radare2 should apply the identified fix immediately to prevent potential service instability. Given the existence of a proof-of-concept, the urgency for remediation is high to ensure the reliability of forensic and analysis environments.