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CVE-2026-53400

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix adapter registration race Adapters can be looked up based on their id using i2c_get_adapter() which takes a refe…

Published Jul 19, 2026CWE-362EPSS 0.11%

Overview

CVE-2026-53400 is a high-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

i2c: core: fix adapter registration race

Adapters can be looked up based on their id using i2c_get_adapter()

which takes a reference to the embedded struct device.

Make sure that the adapter (including its struct device) has been

initialised before adding it to the IDR to avoid accessing uninitialised

data which could, for example, lead to NULL-pointer dereferences or

use-after-free.

Note that the i2c-dev chardev, which is registered from a bus notifier,

currently uses i2c_get_adapter() so the adapter needs to be added to the

IDR before registration.

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/1febb174815bcae56d73587e99e8f87e02f0784dRefgit.kernel.org/stable/c/2e57c788e71f1763445f812eba4e0b4a2fbd0646Refgit.kernel.org/stable/c/6a946038f2a5a8c29048c6af369d4e391448a5c5Refgit.kernel.org/stable/c/78793c75dc6d0ff2e4d50ad617349b328a99054eRefgit.kernel.org/stable/c/a4365bc41baaf67f3a5aa8556d23544e6ec7480aRefgit.kernel.org/stable/c/a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0Refgit.kernel.org/stable/c/ba14d7cf2fe7284610a29854bdff22b2537d3ce6Refgit.kernel.org/stable/c/da9d8d9711f78deebc202d0cffcf577e45ee8621

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53400?

CVE-2026-53400 is a high-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-53400?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53400?

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-2026-53400?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53400 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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