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Vulnerabilities

Vulnerability · CVE-2025-13397

A security vulnerability has been detected in mrubyc up to 3.4.

Published Nov 19, 2025 · catalog updated Nov 19, 2025 · A security vulnerability has

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-13397. EPSS is 0.16%. Act only if a listed version of A security vulnerability has is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A security vulnerability has).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.16%
Remediation
Vendor / distro source
Affected products
vendor n/a mrubyc 3.4

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor n/a mrubyc 3.43.4

How to fix CVE-2025-13397

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-13397. EPSS is 0.16%. Act only if a listed version of A security vulnerability has is installed.

Which versions are affected?

Compare what you have installed with n/a mrubyc 3.4 3.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.16%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 19, 2025 · EUVD

    Detected

    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.

  2. Nov 19, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-13397

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-13397

    30-day exploitation probability 0.16%

    first.org
  • EUVDVulnerability recordEUVD-2025-198212

    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 0091119048

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 28, 2026
  • EUVDOct 28, 2026