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Fencer Vulns
high 7.7

CVE-2022-1427 json

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

published 2022-04-22 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-24741

cvss
7.7
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

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.

Patch / fix

  • mruby mruby/mruby 3.2
  • mruby Debian 14, Debian 13, Debian 12 3.1.0-1

debian advisories DEBIAN-CVE-2022-1427

  • mruby openSUSE Tumbleweed 3.1.0-1.1

opensuse advisories openSUSE-SU-2024:12703-1

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

alpine advisories ALPINE-CVE-2022-1427

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

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/23b6f0a9-64f5-421e-a55f-b5b7a671f301 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 7.7 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • mruby mruby/mruby

Classification

Weakness

References

Sources

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.