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Vulnerability record · CVE-2026-53400 · published 19 July 2026

CVE-2026-53400: Linux kernel race condition vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.11% · top 99.0% CWE-362 · Race condition
7.8CVSS 3.1 base score
0.11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References
8 Sep 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/1febb174815bcae56d73587e99e8f87e02f0784d Patch
https://git.kernel.org/stable/c/2e57c788e71f1763445f812eba4e0b4a2fbd0646 Patch
https://git.kernel.org/stable/c/6a946038f2a5a8c29048c6af369d4e391448a5c5 Patch
https://git.kernel.org/stable/c/78793c75dc6d0ff2e4d50ad617349b328a99054e Patch
https://git.kernel.org/stable/c/a4365bc41baaf67f3a5aa8556d23544e6ec7480a Patch
https://git.kernel.org/stable/c/a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0 Patch
https://git.kernel.org/stable/c/ba14d7cf2fe7284610a29854bdff22b2537d3ce6 Patch
https://git.kernel.org/stable/c/da9d8d9711f78deebc202d0cffcf577e45ee8621 Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html

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Source: NIST National Vulnerability Database (record CVE-2026-53400), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.