CVE-2018-10191 json
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 pres…
published 2018-04-17 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-2267
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.6%
- EPSS 2.6% chance of exploitation in 30 days, percentile 85%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- mruby Debian 14, Debian 13, Debian 12 1.4.0+20180418+git54905e98-1
debian advisories DEBIAN-CVE-2018-10191
Exploit prediction
2.59% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/mruby/mruby/issues/3995 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-190 Integer Overflow or Wraparound
References
-
github.com
/mruby/mruby/commit/1905091634a6a2925c911484434448e568330626
patch, third-party-advisory
-
github.com
/mruby/mruby/issues/3995
exploit, issue-tracking, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2022/05/msg00006.html
mailing-list, third-party-advisory
Sources
- CVE List CVE-2018-10191
- NVD CVE-2018-10191
Fencer Intel 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.