CVE-2025-13120: mruby array.c sort_cmp use after free

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-11-13 · updated 2026-10-19
Weakness: CWE-119

Description

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.

Affected products

mruby/mruby: through 3.4.0

References

https://github.com/makesoftwaresafe/mruby/pull/263
https://github.com/mruby/mruby/
https://github.com/mruby/mruby/commit/eb398971bfb43c38db3e04528b68ac9a7ce509bc
https://github.com/mruby/mruby/issues/6649
https://github.com/mruby/mruby/issues/6649#issue-3534393003
https://vuldb.com/?ctiid.332325
https://vuldb.com/?id.332325
https://vuldb.com/?submit.683435

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