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Unrated severityNVD Advisory· Published May 1, 2025· Updated Nov 3, 2025

i3c: Add NULL pointer check in i3c_master_queue_ibi()

CVE-2025-23147

Description

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

i3c: Add NULL pointer check in i3c_master_queue_ibi()

The I3C master driver may receive an IBI from a target device that has not been probed yet. In such cases, the master calls i3c_master_queue_ibi() to queue an IBI work task, leading to "Unable to handle kernel read from unreadable memory" and resulting in a kernel panic.

Typical IBI handling flow: 1. The I3C master scans target devices and probes their respective drivers. 2. The target device driver calls i3c_device_request_ibi() to enable IBI and assigns dev->ibi = ibi. 3. The I3C master receives an IBI from the target device and calls i3c_master_queue_ibi() to queue the target device driver’s IBI handler task.

However, since target device events are asynchronous to the I3C probe sequence, step 3 may occur before step 2, causing dev->ibi to be NULL, leading to a kernel panic.

Add a NULL pointer check in i3c_master_queue_ibi() to prevent accessing an uninitialized dev->ibi, ensuring stability.

Affected products

80

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

9

News mentions

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