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.
Affected versions
Linux kernel versions
2.6.22
and later are affected. Fixed in
6.12.95,
6.18.38,
7.1.3,
7.2-rc1
and their respective stable series.
References
4 totalFrequently asked questions
-
What is CVE-2026-53400?
CVE-2026-53400 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.22 onward and has been patched in 6.12.95, 6.18.38, 7.1.3 and others. CVE-2026-53400 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-53400?
Yes — CVE-2026-53400 has been patched. Fixed versions include 6.12.95, 6.18.38, 7.1.3 and others. If you are running Linux kernel 2.6.22 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-53400 actively exploited?
No — CVE-2026-53400 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.