CVE-2025-13397: mruby\/c Null Dereference — Fix

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.

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CVSS v3.1 Score

3.3

LOW

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-404 CWE-404

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
s-itoc	mruby\/c	< 3.4

References

Advisories & Patches

https://github.com/mrubyc/mrubyc/commit/009111904807b8567262036bf45297c3da8f1c87

Other References

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

Frequently Asked Questions

What is CVE-2025-13397? +

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. It has a CVSS v3.1 base score of 3.3 (LOW).

How severe is CVE-2025-13397? +

CVE-2025-13397 has a CVSS v3.1 score of 3.3 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2025-13397? +

CVE-2025-13397 affects products from s-itoc, specifically: mruby\/c. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-13397? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-13397