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CVE-2026-53146

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Limit XDomain response copy to actual frame size tb_xdomain_copy() copies req->response_size bytes from the receiv…

Published Jun 25, 2026EPSS 0.26%

Overview

CVE-2026-53146 is a high-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

thunderbolt: Limit XDomain response copy to actual frame size

tb_xdomain_copy() copies req->response_size bytes from the received

packet buffer regardless of the actual frame size. When a short

response arrives, this reads past the valid frame data in the DMA

pool buffer into stale contents from previous transactions.

Use the minimum of frame size and expected response size for the

copy length.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/033dfa63bf6be2653441a1dccae4a8313a91bb9dRefgit.kernel.org/stable/c/4db2bd2ed4785dbadaeeab9f4e346b21ac5fb8ebRefgit.kernel.org/stable/c/7720654b4842bcdfeb64bc002f6186041849e1e7Refgit.kernel.org/stable/c/a15b6d3136accb2bf84b04d9a3ddd991f7fbf1cbRefgit.kernel.org/stable/c/b2c1e5d9f1598cc1a4736d5c6bd1218f90805ee4Refgit.kernel.org/stable/c/b5daa920f44cb582272fc9bfaeb67408776cbaefRefgit.kernel.org/stable/c/c55da494dfb445fb28df3a9d293c2be6a299cd01Refgit.kernel.org/stable/c/fc261397295b8ad0654cec747b0ec25ea0011995

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53146?

CVE-2026-53146 is a high-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-53146?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-53146?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53146?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53146 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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