Critical severity9.8OSV Advisory· Published Apr 17, 2018· Updated Jun 17, 2026

CVE-2018-10191

Description

In versions of mruby up to and including 1.4.0, an integer overflow exists in src/vm.c::mrb_vm_exec() when handling OP_GETUPVAR in the presence of deep scope nesting, resulting in a use-after-free. An attacker that can cause Ruby code to be run can use this to possibly execute arbitrary code.

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Affected products

Mruby/Mrubyllm-fuzzy3 versions
<=1.4.0+ 2 more
- (no CPE)range: <=1.4.0
- (no CPE)range: 1.0.0, 1.1.0, 1.2.0, …
- cpe:2.3:a:mruby:mruby:*:*:*:*:*:*:*:*range: <=1.4.0
Debian/linux
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

github.com/mruby/mruby/commit/1905091634a6a2925c911484434448e568330626nvdPatchThird Party Advisory
github.com/mruby/mruby/issues/3995nvdExploitIssue TrackingThird Party Advisory
lists.debian.org/debian-lts-announce/2022/05/msg00006.htmlnvdMailing ListThird Party Advisory

News mentions

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cvss	0.637
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000