What is CVE-2025-13120?

CVE-2025-13120 is a medium-severity vulnerability in Mruby, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2025-11-13.

How severe is CVE-2025-13120?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Buffer overflow in Mruby

CVE-2025-13120

A vulnerability has been found in mruby up to 3.4.0. This vulnerability affects the function sort_cmp of the file src/array.c. Such manipulation leads to use after free. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is eb398971bfb43c38db3e04528b68ac9a7ce509bc. It is advisable to implement a patch to correct this issue.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (3.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

Mruby
N/a Mruby — versions 3.0, 3.1, 3.2

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
cna@vuldb.com (issue-tracking, Issue Tracking, Vendor Advisory)
cna@vuldb.com (issue-tracking, Issue Tracking)
cna@vuldb.com (issue-tracking, exploit, Issue Tracking, Vendor Advisory)
cna@vuldb.com (Patch, patch)
cna@vuldb.com (product)

Frequently asked questions

What is CVE-2025-13120?: CVE-2025-13120 is a medium-severity vulnerability in Mruby, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2025-11-13.
How severe is CVE-2025-13120?: Medium severity. CVSS v3 base score is 5.3 out of 10.