CVE-2026-72067 cpu: hotplug: Preserve per instance callback errors
A logic error in Linux kernel CPU hotplug rollback could mask original callback failures, potentially leading to inconsistent system states.
- 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-2026-72067?
CVE-2026-72067 is a high-severity vulnerability in Linux, published on 15 Aug 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:
cpu: hotplug: Preserve per instance callback errors
cpuhp_invoke_callback() unwinds earlier callbacks for the same hotplug state when one instance fails. The rollback path currently reuses ret, so a successful rollback can hide the original error and make the failed transition look successful.
Keep the rollback result separate from the original error.
Weakness: CWE-754
Which versions are affected by CVE-2026-72067?
How do I fix CVE-2026-72067?
Apply the vendor's patch.
Is CVE-2026-72067 being exploited?
There is no known exploitation of CVE-2026-72067 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72067, DEBIAN-CVE-2026-72067, GHSA-ff23-gxr2-xxhq, UBUNTU-CVE-2026-72067.