CVE-2022-0717

Process crash or corruption via array assignment compilation

Published Feb 23, 2022 · Updated Aug 2, 2024

Out-of-bounds read in mruby before 3.2 allows local users to crash or corrupt a process by compiling a crafted array assignment. In gen_assignment() in mrbgems/mruby-compiler/core/codegen.c, a boundary error fails to package the fifteenth assignment value into an OP_ARRAY instruction, leaving compiler stack bookkeeping inconsistent. Reachability requires local processing of attacker-controlled Ruby source; successful exploitation affects the compiling process, with no direct disclosure reported.

CVSS severity6.8
Medium
EPSS probability0.92%
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 mruby before 3.2 allows local users to crash or corrupt a process by compiling a crafted array assignment. In gen_assignment() in mrbgems/mruby-compiler/core/codegen.c, a boundary error fails to package the fifteenth assignment value into an OP_ARRAY instruction, leaving compiler stack bookkeeping inconsistent. Reachability requires local processing of attacker-controlled Ruby source; successful exploitation affects the compiling process, with no direct disclosure reported.

The record

CVE
CVE-2022-0717
Published
Feb 23, 2022
Updated
Aug 2, 2024
Vendor
mruby
Product
mruby
Classifications
CWE-125
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 23, 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?

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  1. Affected versionversion=unspecified <3.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

mruby · mrubyversion=unspecified <3.2

Published CVSS scores

6.8huntr.devCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

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Technologies

Your stack

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Your stack

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