CVE-2018-10191
9.8
CRITICAL · CVSS 3.1 · EPSS 2.6% (pctl 85)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 2.59% — more likely to be exploited than 85% of all CVEs |
| Weakness | CWE-190 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2018-04-17 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| debian | debian linux |
| mruby | mruby |
References
- https://github.com/mruby/mruby/commit/1905091634a6a2925c911484434448e568330626
- https://github.com/mruby/mruby/issues/3995
- https://lists.debian.org/debian-lts-announce/2022/05/msg00006.html
- https://github.com/mruby/mruby/commit/1905091634a6a2925c911484434448e568330626
- https://github.com/mruby/mruby/issues/3995
- https://lists.debian.org/debian-lts-announce/2022/05/msg00006.html
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