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CVE-2026-53400

HIGHCVSS 7.8/10EPSS 0.13%

Last modified

CVE-2026-53400 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.13%

2.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 6e13e641841833cc2aa5baefe89bb04bc388801b, < 2e57c788e71f1763445f812eba4e0b4a2fbd0646; >= 6e13e641841833cc2aa5baefe89bb04bc388801b, < a4365bc41baaf67f3a5aa8556d23544e6ec7480a; >= 6e13e641841833cc2aa5baefe89bb04bc388801b, < 1febb174815bcae56d73587e99e8f87e02f0784d; >= 6e13e641841833cc2aa5baefe89bb04bc388801b, < da9d8d9711f78deebc202d0cffcf577e45ee8621; >= 6e13e641841833cc2aa5baefe89bb04bc388801b, < 78793c75dc6d0ff2e4d50ad617349b328a99054e; >= 6e13e641841833cc2aa5baefe89bb04bc388801b, < 6a946038f2a5a8c29048c6af369d4e391448a5c5; >= 6e13e641841833cc2aa5baefe89bb04bc388801b, < a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0; >= 6e13e641841833cc2aa5baefe89bb04bc388801b, < ba14d7cf2fe7284610a29854bdff22b2537d3ce6
LinuxLinux2.6.22

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-53400?
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.
How severe is CVE-2026-53400?
CVE-2026-53400 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.13% probability of exploitation in the next 30 days.
How do I fix CVE-2026-53400?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST