CVE-2021-4021

Public Exploit

Description

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.

Categories

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.24%
Third-Party Advisory github.com
Affected: n/a radare2
Published at:
Updated at:

References

Link Tags
https://github.com/radareorg/radare2/issues/19436 issue tracking exploit third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-4021?
CVE-2021-4021 has been scored as a high severity vulnerability.
How to fix CVE-2021-4021?
To fix CVE-2021-4021, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-4021 being actively exploited in the wild?
It is possible that CVE-2021-4021 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-4021?
CVE-2021-4021 affects n/a radare2.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.