CVE-2022-0521Public exploit

Process crash via malformed Java class attributes

Published Feb 8, 2022 · Updated Aug 2, 2024

Out-of-bounds read in radare2 before 5.6.2 allows local users to crash its Java class-file parser with a crafted file. The shlr/java/class.c attribute constructors read fixed-width fields after accepting undersized buffers and compare an inner-class offset against the wrong size basis. Opening a malicious Java class file is required, and the demonstrated consequence is termination of the radare2 process by segmentation fault.

CVSS severity6.3
Medium
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in radare2 before 5.6.2 allows local users to crash its Java class-file parser with a crafted file. The shlr/java/class.c attribute constructors read fixed-width fields after accepting undersized buffers and compare an inner-class offset against the wrong size basis. Opening a malicious Java class file is required, and the demonstrated consequence is termination of the radare2 process by segmentation fault.

The record

CVE
CVE-2022-0521
Published
Feb 8, 2022
Updated
Aug 2, 2024
Vendor
radareorg
Product
radare2
Classifications
CWE-788, CWE-119, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <5.6.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

radareorg · radare2version=unspecified <5.6.2

Published CVSS scores

7.1NISTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
5.8NISTAV:N/AC:M/Au:N/C:P/I:N/A:P
6.3huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-788Access of Memory Location After End of Buffer
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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