CVE-2026-31523 nvme-pci: ensure we're polling a polled queue
A race condition in the Linux kernel NVMe driver allows double completions during queue resets, potentially causing system instability or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-31523?
CVE-2026-31523 is a medium-severity vulnerability in Linux kernel, published on 22 Apr 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:
nvme-pci: ensure we're polling a polled queue
A user can change the polled queue count at run time. There's a brief window during a reset where a hipri task may try to poll that queue before the block layer has updated the queue maps, which would race with the now interrupt driven queue and may cause double completions.
Weakness: CWE-367
Which versions are affected by CVE-2026-31523?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31523?
Apply the vendor's patch.
Is CVE-2026-31523 being exploited?
There is no known exploitation of CVE-2026-31523 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-83237, BELL-CVE-2026-31523, DEBIAN-CVE-2026-31523, GHSA-gvcv-rjfq-gg9g, ROOT-OS-DEBIAN-11-CVE-2026-31523, ROOT-OS-DEBIAN-12-CVE-2026-31523 and 4 more.