CVE-2026-53400
i2c: core: fix adapter registration race
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/78793c75dc6d0ff2e4d50ad617349b328a99054e
- https://git.kernel.org/stable/c/6a946038f2a5a8c29048c6af369d4e391448a5c5
- https://git.kernel.org/stable/c/a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0
- https://git.kernel.org/stable/c/ba14d7cf2fe7284610a29854bdff22b2537d3ce6
- https://git.kernel.org/stable/c/2e57c788e71f1763445f812eba4e0b4a2fbd0646
References (10)
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