CVE-2022-0890

NULL Pointer Dereference in mruby/mruby

5.5 MediumFix available

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.83%Down 0.1 points since Mar 10, 2022

What each source reports

CVE List Score used 5.5

NULL Pointer Dereference in mruby/mruby

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

Record: CVE-2022-0890
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-476
Updated: 2026-11-02

EUVDEUVD-2022-15926 5.5

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

Record: EUVD-2022-15926
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-j279-7379-x7mj 5.5

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

Record: GHSA-j279-7379-x7mj
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-476
Updated: 2026-11-02

NVD 5.5

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

Record: CVE-2022-0890
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0: 7.1 HighAV:N/AC:M/Au:N/C:N/I:N/A:C
Weakness: CWE-476
Updated: 2026-11-02

OSVALPINE-CVE-2022-0890 5.5

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

Record: ALPINE-CVE-2022-0890
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-03

OSVAZL-41766 5.5

CVE-2022-0890 affecting package rust for versions less than 1.75.0-1

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

Record: AZL-41766
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-05

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OSV 5.5

NULL Pointer Dereference in mruby/mruby

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

Record: CVE-2022-0890
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-476
Updated: 2026-11-02

OSVDEBIAN-CVE-2022-0890 5.5

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

Record: DEBIAN-CVE-2022-0890
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-03

OSVUBUNTU-CVE-2022-0890 5.5

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

Record: UBUNTU-CVE-2022-0890
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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
`rust` Azure Linux:3	before 1.75.0-1	1.75.0-1
`mruby` Debian:12	before 3.1.0-1	3.1.0-1

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Affected packages
Package	Affected	Fixed
`mruby` Debian:13	before 3.1.0-1	3.1.0-1
`mruby` Debian:14	before 3.1.0-1	3.1.0-1
`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
Nov 5, 2026	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-2022-0890 is a medium vulnerability (CVSS 5.5) in Mruby, published March 10, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.83%, the 57th percentile. Fixed in mruby 3.1.0-r0.

References

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