What is CVE-2021-4022?

CVE-2021-4022 is a medium-severity vulnerability in Rizin, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2022-08-25.

How severe is CVE-2021-4022?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-4022 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Use After Free in Rizin

CVE-2021-4022

A vulnerability was found in rizin. The bug involves an ELF64 binary for the HPPA architecture. When a specially crafted binarygets analysed by rizin, it causes rizin to crash by freeing an uninitialized (and potentially user controlled, depending on the build) memory address.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.003 (21.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Rizin
N/a Rizin — versions rizin 0.3.1 and before

Weakness classification (CWE)

Public proof-of-concept exploits

Live-Hack-CVE/CVE-2021-4022

References

patrick@puiterwijk.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-4022?: CVE-2021-4022 is a medium-severity vulnerability in Rizin, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2022-08-25.
How severe is CVE-2021-4022?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-4022 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.