CVE-2021-4021: radare radare2 Uncontrolled Resource Consumption
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-4021
Published 24-02-2022Last modified 03-08-2024
Vulnerability summary
CVE-2021-4021 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in radare radare2. EPSS estimates a 1.07% chance of exploitation in the next 30 days, higher than 64.4% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
1.07%
0%100%
Low · +0.03 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 24-02-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.07%
Chance of exploitation in the next 30 days
Percentile
64%
Versus all other CVEs
30-day change
+0.03 pp
From 1.05% on 19-09-2026
19-09-202619-10-2026
EPSS score1.07%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundRadare2
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Radare1 product
- radare2≤ 5.5.0
Ubuntu1 product
- radare2All versions (No fix recorded)
2 vendors · 2 products
References
3 links- github.com/radareorg/radare2/issues/19436X Refsource MISCREPORTExploitIssue TrackingThird Party Advisory