CVE-2026-38754 Memory corruption in BusyBox
Attackers can cause a Denial of Service in BusyBox via a heap overflow in the ash shell when processing crafted input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-38754?
CVE-2026-38754 is a medium-severity memory corruption vulnerability in BusyBox, published on 15 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A heap overflow in the ifsbreakup() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input.
Which versions are affected by CVE-2026-38754?
It affects 1 product.
Products include Busybox Busybox.
How do I fix CVE-2026-38754?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-38754 being exploited?
There is no known exploitation of CVE-2026-38754 in the wild and no public exploit code.
Other vulnerabilities in BusyBox
Sources
Also known as AZL-92484, BELL-CVE-2026-38754, DEBIAN-CVE-2026-38754, ECHO-d18b-2042-fd80, GHSA-jj7c-h3wm-vjfw, MINI-w98q-8p27-cqq8 and 1 more.