CVE-2026-98474 s390/pci: Fix missing device lock in zpci_report_status()
A missing device lock in the Linux kernel's s390 PCI subsystem can lead to inconsistent states and potential 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-2026-98474?
CVE-2026-98474 is a vulnerability in Linux, published on 18 Oct 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:
s390/pci: Fix missing device lock in zpci_report_status()
When pdev is non-NULL, zpci_report_status() accesses the device's driver. To get a consistent state matching the recovery, the device lock needs to be held. Do so by expanding the existing device lock critical section.
The lock only needs to be held when the pdev is non-NULL, so extract the pdev-specific reporting into a helper function which also adds a lockdep assertion to detect calls without the device lock held.
Which versions are affected by CVE-2026-98474?
How do I fix CVE-2026-98474?
Apply the vendor's patch.
Is CVE-2026-98474 being exploited?
There is no known exploitation of CVE-2026-98474 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-98474, DEBIAN-CVE-2026-98474, GHSA-m978-pm8w-665r, UBUNTU-CVE-2026-98474.