CVE-2026-38973 Memory corruption in n/a
An out-of-bounds read in mrubyc's method lookup allows attackers to cause denial of service or disclose sensitive memory contents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-38973?
CVE-2026-38973 is a medium-severity memory corruption vulnerability in n/a, published on 6 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
mrubyc through release3.4.1 was found to contain an out-of-bounds read in builtin missing-method lookup inside mrbc_find_method().
Weakness: CWE-125
Which versions are affected by CVE-2026-38973?
How do I fix CVE-2026-38973?
No fix has been published for CVE-2026-38973 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-38973 being exploited?
There is no known exploitation of CVE-2026-38973 in the wild and no public exploit code.
Sources
Also known as GHSA-r4w3-7jp7-m9g5.