CVE-2026-98147 printk: Don't WARN on kthread_run failure.
A flaw in the Linux kernel's printk subsystem could cause unnecessary warnings on thread creation failure, potentially leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98147?
CVE-2026-98147 is a medium-severity denial of service vulnerability in Linux kernel, published on 25 Sep 2026.
Official description
In the Linux kernel, the following vulnerability has been resolved:
printk: Don't WARN on kthread_run failure.
Since __kthread_create_on_node() returns -EINTR upon SIGKILL, we should not use WARN_ON() in order to catch kthread_run() failure.
Weakness: CWE-617
Which versions are affected by CVE-2026-98147?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-98147?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-98147 being exploited?
There is no known exploitation of CVE-2026-98147 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-98147, DEBIAN-CVE-2026-98147, GHSA-235g-f6jm-cm7p, UBUNTU-CVE-2026-98147.