CVE-2022-0630

Information disclosure and crash via unchecked hash access

Published Feb 19, 2022 · Updated Aug 2, 2024

Out-of-bounds read in mruby before 3.2 allows local users to expose memory or crash an application through crafted Ruby code. In mrb_vm_exec, double-splat handling passes an operand to mrb_hash_set after only a debug assertion, so a non-Hash value reaches hash access without runtime type validation. Execution requires a user or embedding application to run attacker-controlled Ruby code; confidentiality and availability are affected, not integrity.

CVSS severity7.1
High
EPSS probability0.99%
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 expose memory or crash an application through crafted Ruby code. In mrb_vm_exec, double-splat handling passes an operand to mrb_hash_set after only a debug assertion, so a non-Hash value reaches hash access without runtime type validation. Execution requires a user or embedding application to run attacker-controlled Ruby code; confidentiality and availability are affected, not integrity.

The record

CVE
CVE-2022-0630
Published
Feb 19, 2022
Updated
Aug 2, 2024
Vendor
mruby
Product
mruby
Classifications
CWE-125, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 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 <3.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

mruby · mrubyversion=unspecified <3.2

Published CVSS scores

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

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1203Exploitation for Client Execution

Public exploit references

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Technologies

Your stack

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Your stack

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