CVE-2025-13397

mrubyc alloc.c mrbc_raw_realloc null pointer dereference

State: Published
Severity: 4.8 Medium
Published: Nov 19, 2025
Updated: Nov 19, 2025
Reserved: Nov 19, 2025

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.

Scores

CVSS	Score	Vector	Source
4.0	4.8 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X	VulDB
3.1	3.3 Low	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	VulDB
3.0	3.3 Low	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C	VulDB
2.0	1.7 Low	AV:L/AC:L/Au:S/C:N/I:N/A:P/E:ND/RL:OF/RC:C	VulDB

Weaknesses

CWE-476 NULL Pointer Dereference
CWE-404 Denial of Service

Affected Products

Product	Versions
mrubycn/a	3.0Affected 3.1Affected 3.2Affected 3.3Affected 3.4Affected

References

VDB-332925 | mrubyc alloc.c mrbc_raw_realloc null pointer dereferencevdb-entrytechnical-description
VDB-332925 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #692130 | mrubyc 3.4 NULL Pointer Dereferencethird-party-advisory
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

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