NULL Pointer Dereference in mruby/mruby

published 2022-02-04 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-15619

cvss: 5.5; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits: 0; none known

NULL Pointer Dereference in Homebrew mruby prior to 3.2.

Patch / fix

fixed in 1 distros 3 links 1

mruby mruby/mruby 3.2

debian opensuse alpine

mruby Debian 14, Debian 13, Debian 12 3.1.0-1

debian advisories DEBIAN-CVE-2022-0481

mruby openSUSE Tumbleweed 3.0.0-4.1

opensuse advisories openSUSE-SU-2024:11834-1

mruby Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 3.1.0-r0

alpine advisories ALPINE-CVE-2022-0481

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

github.com/mruby/mruby@ae3c997 commit

Exploit prediction

0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

huntr.dev https://huntr.dev/bounties/54725c8c-87f4-41b6-878c-01d8e0ee7027 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.0	5.5	CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	7.8	AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

mruby mruby/mruby

Classification

Weakness

CWE-476 NULL Pointer Dereference

References

github.com /mruby/mruby/commit/ae3c99767a27f5c6c584162e2adc6a5d0eb2c54e
patch, third-party-advisory
huntr.dev /bounties/54725c8c-87f4-41b6-878c-01d8e0ee7027
exploit, third-party-advisory

Sources

CVE List CVE-2022-0481
NVD CVE-2022-0481

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary