CVE-2026-72434 netfilter: ipset: make sure gc is properly stopped
A race condition in Linux kernel netfilter ipset garbage collection during set destruction can lead to improper shutdown and potential denial of service.
- 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-2026-72434?
CVE-2026-72434 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:
netfilter: ipset: make sure gc is properly stopped
Sashiko noticed that when destroying a set, cancel_delayed_work_sync() was called while gc calls queue_delayed_work() unconditionally which can lead not to properly shutting down the gc.
Which versions are affected by CVE-2026-72434?
How do I fix CVE-2026-72434?
Apply the vendor's patch.
Is CVE-2026-72434 being exploited?
There is no known exploitation of CVE-2026-72434 in the wild and no public exploit code.
Sources
Also known as AZL-96341, BELL-CVE-2026-72434, DEBIAN-CVE-2026-72434, GHSA-c7hq-44p5-58fg, UBUNTU-CVE-2026-72434.