CVE-2018-12249 Null dereference in n/a

What is CVE-2018-12249?

CVE-2018-12249 is a high-severity vulnerability in Debian Debian Linux, published on 12 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because "class BasicObject" is not properly supported in class.c.

Weakness: CWE-476

Which versions are affected by CVE-2018-12249?

It affects 2 products.

Products include Debian Debian Linux, Mruby Mruby.

How do I fix CVE-2018-12249?

Upgrade to a fixed version.

Is CVE-2018-12249 being exploited?

There is no known exploitation of CVE-2018-12249 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-12249, GHSA-3h2j-h4g8-5pmr, UBUNTU-CVE-2018-12249.