CVE-2025-13397: mrubyc alloc.c mrbc_raw_realloc null pointer dereference

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: 2025-11-19 · updated 2026-10-19
Weakness: CWE-404

Description

A security vulnerability has been detected in mrubyc up to 3.4. This impacts the function mrbc_raw_realloc of the file src/alloc.c. Such manipulation of the argument ptr leads to null pointer dereference. An attack has to be approached locally. The name of the patch is 009111904807b8567262036bf45297c3da8f1c87. It is advisable to implement a patch to correct this issue.

Affected products

S-Itoc Mruby/C: through 3.4

References

https://github.com/mrubyc/mrubyc/commit/009111904807b8567262036bf45297c3da8f1c87
https://github.com/mrubyc/mrubyc/issues/244
https://github.com/mrubyc/mrubyc/issues/244#issuecomment-3400382026
https://vuldb.com/?ctiid.332925
https://vuldb.com/?id.332925
https://vuldb.com/?submit.692130

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