CVE-2022-1427

Out-of-bounds Read in mrb_obj_is_kind_of in in mruby/mruby

7.7 HighFix available

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: High

Exploit likelihood

0.48%Down 2.0 points since Apr 23, 2022

What each source reports

CVE List Score used 7.7

Out-of-bounds Read in mrb_obj_is_kind_of in in mruby/mruby

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Record: CVE-2022-1427
CVSS 3.0: 7.7 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness: CWE-125
Updated: 2026-11-02

EUVDEUVD-2022-24741 7.7

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Record: EUVD-2022-24741
CVSS 3.0: 7.7 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-45gc-6g92-9g2j 7.8

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. #...

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Record: GHSA-45gc-6g92-9g2j
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-125
Updated: 2026-11-02

NVD 7.8

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Record: CVE-2022-1427
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0: 7.7 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS 2.0: 4.6 MediumAV:L/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-125
Updated: 2026-11-02

OSVALPINE-CVE-2022-1427 7.8

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Record: ALPINE-CVE-2022-1427
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

OSV 7.7

Out-of-bounds Read in mrb_obj_is_kind_of in in mruby/mruby

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Record: CVE-2022-1427
CVSS 3.0: 7.7 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness: CWE-125
Updated: 2026-11-02

OSVDEBIAN-CVE-2022-1427 7.8

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Record: DEBIAN-CVE-2022-1427
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

OSVUBUNTU-CVE-2022-1427 7.8

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Record: UBUNTU-CVE-2022-1427
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0: 7.7 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Updated: 2026-11-02

OSVopenSUSE-SU-2024:12703-1 No score

libmruby3_1_0-3.1.0-1.1 on GA media

These are all security issues fixed in the libmruby3_1_0-3.1.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:12703-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`mruby` Alpine:v3.17	before 3.1.0-r0	3.1.0-r0
`mruby` Alpine:v3.18	before 3.1.0-r0	3.1.0-r0
`mruby` Alpine:v3.19	before 3.1.0-r0	3.1.0-r0
`mruby` Alpine:v3.20	before 3.1.0-r0	3.1.0-r0
`mruby` Alpine:v3.21	before 3.1.0-r0	3.1.0-r0
`mruby` Alpine:v3.22	before 3.1.0-r0	3.1.0-r0
`mruby` Alpine:v3.23	before 3.1.0-r0	3.1.0-r0
`mruby` Alpine:v3.24	before 3.1.0-r0	3.1.0-r0
`mruby` Debian:12	before 3.1.0-1	3.1.0-1
`mruby` Debian:13	before 3.1.0-1	3.1.0-1

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Affected packages
Package	Affected	Fixed
`mruby` Debian:14	before 3.1.0-1	3.1.0-1
`mruby` Ubuntu:16.04:LTS	All versions, plus listed versions 1.1.0+20150817+gita1731254-11.1.0+20150906+git1cbbb7e1-11.2.0+20160315+git4f20d58a-1	None known
`mruby` Ubuntu:18.04:LTS	All versions, plus listed versions 1.3.0-11.3.0+20170925+git38185028-11.3.0+20171029+git77edafb0-11.4.0-1	None known
`mruby` Ubuntu:20.04:LTS	All versions, plus listed versions 2.0.0-1	None known
`mruby` Ubuntu:22.04:LTS	All versions, plus listed versions 2.1.2-33.0.0-13.0.0-3	None known
`mruby` Ubuntu:24.04:LTS	All versions, plus listed versions 3.2.0-13.2.0-2	None known
`mruby` Ubuntu:25.10	All versions, plus listed versions 3.3.0-1	None known
`mruby` Ubuntu:26.10	All versions, plus listed versions 3.4.0-23.4.0-34.0.0-1	None known
`mruby` Ubuntu:26.04:LTS	All versions, plus listed versions 3.3.0-13.4.0-2	None known
`mruby` openSUSE:Tumbleweed From an advisory covering 3 CVEs	before 3.1.0-1.1	3.1.0-1.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts	OSV
Nov 3, 2026	affected, aliases, references	OSV
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-1427 is a high vulnerability (CVSS 7.7) in Mruby, published April 22, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 41st percentile. Fixed in mruby 3.1.0-r0.

References

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