CVE-2022-1286

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in mruby/mruby

5.9 MediumFix available

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. 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: Low
Integrity: Low
Availability: Low

Exploit likelihood

1.18%Down 1.3 points since Apr 11, 2022

What each source reports

CVE List Score used 5.9

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in mruby/mruby

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Record: CVE-2022-1286
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness: CWE-122
Updated: 2026-11-02

EUVDEUVD-2022-24616 5.9

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Record: EUVD-2022-24616
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated: 2026-11-03

GitHub AdvisoriesGHSA-6c7w-5xfj-j2mc 9.8

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2....

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Record: GHSA-6c7w-5xfj-j2mc
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-122, CWE-787
Updated: 2026-11-02

NVD 9.8

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Record: CVE-2022-1286
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-122, CWE-787
Updated: 2026-11-02

OSV 5.9

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in mruby/mruby

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Record: CVE-2022-1286
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness: CWE-122
Updated: 2026-11-02

OSVDEBIAN-CVE-2022-1286 9.8

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Record: DEBIAN-CVE-2022-1286
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

OSVUBUNTU-CVE-2022-1286 9.8

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Record: UBUNTU-CVE-2022-1286
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated: 2026-11-02

OSVopenSUSE-SU-2024:12024-1 No score

libmruby3_0_0-3.0.0-6.1 on GA media

These are all security issues fixed in the libmruby3_0_0-3.0.0-6.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:12024-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`mruby` Debian:12	before 3.0.0-4	3.0.0-4
`mruby` Debian:13	before 3.0.0-4	3.0.0-4
`mruby` Debian:14	before 3.0.0-4	3.0.0-4
`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 2 CVEs	before 3.0.0-6.1	3.0.0-6.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts	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-2022-1286 is a medium vulnerability (CVSS 5.9) in Mruby, published April 10, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.18%, the 67th percentile. Fixed in mruby 3.0.0-4.

References

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