CVE-2026-90290 arm64: hibernate: Restore DAIF state on error
A flaw in the Linux kernel arm64 hibernation code fails to restore interrupt state on error, potentially causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90290?
CVE-2026-90290 is a denial of service vulnerability in Linux, published on 17 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:
arm64: hibernate: Restore DAIF state on error
Sashiko AI has reported that if swsusp_mte_save_tags() for some reason fails we return from swsusp_arch_suspend() with DAIF being masked - that is not what we'd expect. Restore the saved DAIF state before returning from the error path.
Which versions are affected by CVE-2026-90290?
How do I fix CVE-2026-90290?
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-2026-90290 being exploited?
There is no known exploitation of CVE-2026-90290 in the wild and no public exploit code.
Sources
Also known as AZL-103001, BELL-CVE-2026-90290, DEBIAN-CVE-2026-90290, GHSA-49wg-x228-h4jh, UBUNTU-CVE-2026-90290.