Critical severity9.8NVD Advisory· Published Jul 21, 2020· Updated Jun 17, 2026

CVE-2020-15866

Description

mruby through 2.1.2-rc has a heap-based buffer overflow in the mrb_yield_with_class function in vm.c because of incorrect VM stack handling. It can be triggered via the stack_copy function.

Affected products

mruby/mrubydescription
Mruby/Mruby3 versions
cpe:2.3:a:mruby:mruby:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mruby:mruby:*:*:*:*:*:*:*:*range: <=2.1.1
- cpe:2.3:a:mruby:mruby:2.1.2:rc:*:*:*:*:*:*
- (no CPE)range: <=2.1.2-rc
Debian/linux
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

github.com/mruby/mruby/issues/5042nvdExploitThird Party Advisory
lists.debian.org/debian-lts-announce/2022/05/msg00006.htmlnvdMailing ListThird Party Advisory

News mentions

No linked articles in our index yet.

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