What’s Vulnerable › Vulnerabilities

CVE-2026-97508: thunderbolt: Set tb->root_switch to NULL when domain is stopped

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-03

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.

Affected products

• Linux kernel: 4.15 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

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

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