CVE-2026-98121 watchdog: msc313e: Fix NULL pointer dereference in PM callbacks
A NULL pointer dereference in the msc313e watchdog driver causes a kernel crash during power management transitions, leading to denial of service.
- 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-2026-98121?
CVE-2026-98121 is a medium-severity vulnerability in Linux kernel, published on 25 Sep 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:
watchdog: msc313e: Fix NULL pointer dereference in PM callbacks
msc313e_wdt_probe() doesn't set the driver data for the platform device. As a result, dev_get_drvdata() in msc313e_wdt_suspend() and msc313e_wdt_resume() will return NULL, leading to a NULL pointer dereference afterward.
Set the platform device driver data in msc313e_wdt_probe().
Weakness: CWE-476
Which versions are affected by CVE-2026-98121?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-98121?
Apply the vendor's patch.
Is CVE-2026-98121 being exploited?
There is no known exploitation of CVE-2026-98121 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-104240, BELL-CVE-2026-98121, DEBIAN-CVE-2026-98121, GHSA-mh89-4wj5-pm5q, UBUNTU-CVE-2026-98121.