CVE-2021-4021: Radare RADARE2

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

A vulnerability was found in Radare2 in versions prior to 5.6.2, 5.6.0, 5.5.4 and 5.5.2. Mapping a huge section filled with zeros of an ELF64 binary for MIPS architecture can lead to uncontrolled resource consumption and DoS.

Affected products

• Radare RADARE2: up to and including 5.5.0

Published 2022-02-24. Last modified 2026-06-17.