Low 3.3Published Nov 19, 2025

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

Updated under an hour ago (Oct 26, 2026, 5:00 AM ET)

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It affects s-itoc mruby/c. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for s-itoc mruby/c

Exploited in the last 30 days

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.

CVSS: 3.3 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C
Weakness (CWE): CWE-476, CWE-404
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Analyzed
Record last updated: Nov 19, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

s-itoc mruby/c s-itoc:mruby/c	through 3.4	NVD

References

https://vuldb.com/?id.332925vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.332925signature, permissions-required, vdb-entry
https://vuldb.com/?submit.692130third-party-advisory, vdb-entry
https://github.com/mrubyc/mrubyc/issues/244issue-tracking
https://github.com/mrubyc/mrubyc/issues/244#issuecomment-3400382026issue-tracking
https://github.com/mrubyc/mrubyc/commit/009111904807b8567262036bf45297c3da8f1c87patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.