Vulnerability · Published Feb 24, 2022 · Assigned by fedora
CVE-2021-4021
High 7.5
In plain English
A high-severity uncontrolled resource consumption in radare2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.1%top 34.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | radare2 | 5.5.2-r0 | ALPINE-CVE-2021-4021 |
| Alpine:v3.21 | radare2 | 5.5.2-r0 | ALPINE-CVE-2021-4021 |
| Alpine:v3.22 | radare2 | 5.5.2-r0 | ALPINE-CVE-2021-4021 |
| Alpine:v3.23 | radare2 | 5.5.2-r0 | ALPINE-CVE-2021-4021 |
| Alpine:v3.24 | radare2 | 5.5.2-r0 | ALPINE-CVE-2021-4021 |
| Ubuntu:25.10 | radare2 | no fix listed | UBUNTU-CVE-2021-4021 |
| Ubuntu:26.04:LTS | radare2 | no fix listed | UBUNTU-CVE-2021-4021 |
| Ubuntu:26.10 | radare2 | no fix listed | UBUNTU-CVE-2021-4021 |
Affected products (as reported)
Weakness: CWE-400
References
- https://github.com/radareorg/radare2/issues/19436 x_refsource_MISC