CVE-2026-43150 perf/arm-cmn: Reject unsupported hardware configurations
The Linux kernel arm-cmn driver may suffer memory corruption due to array overflows when handling unsupported hardware configurations, potentially allowing privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-43150?
CVE-2026-43150 is a high-severity memory corruption vulnerability in Linux kernel, published on 6 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
perf/arm-cmn: Reject unsupported hardware configurations
So far we've been fairly lax about accepting both unknown CMN models (at least with a warning), and unknown revisions of those which we do know, as although things do frequently change between releases, typically enough remains the same to be somewhat useful for at least some basic bringup checks. However, we also make assumptions of the maximum supported sizes and numbers of things in various places, and there's no guarantee that something new might not be bigger and lead to nasty array overflows. Make sure we only try to run on things that actually match our assumptions and so will not risk memory corruption.
We have at least always failed on completely unknown node types, so update that error message for clarity and consistency too.
Which versions are affected by CVE-2026-43150?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43150?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-43150 being exploited?
There is no known exploitation of CVE-2026-43150 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43150, DEBIAN-CVE-2026-43150, GHSA-wh2v-8c6h-56m5, ROOT-OS-UBUNTU-2404-CVE-2026-43150, UBUNTU-CVE-2026-43150.