CVE-2026-72291 KVM: s390: Fix unlikely race in try_get_locked_pte()
A race condition in the Linux kernel's KVM s390 subsystem could lead to a denial of service if page table entries are unmapped concurrently.
- 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-2026-72291?
CVE-2026-72291 is a critical 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:
KVM: s390: Fix unlikely race in try_get_locked_pte()
Fix an unlikely race in try_get_locked_pte(), which could have happened if puds or pmds get unmapped between the p?dp_get() and p?d_offset() functions.
Which versions are affected by CVE-2026-72291?
How do I fix CVE-2026-72291?
Apply the vendor's patch.
Is CVE-2026-72291 being exploited?
There is no known exploitation of CVE-2026-72291 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-72291, GHSA-vqgj-mcrm-863f, UBUNTU-CVE-2026-72291.