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
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 to < 1b54faa5f47fa7c642179744aeff03f0810dc62eaffected3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 to < 09359e7c8751961937cb5fc50220969b0a4e1058affected3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 to < 3ba402610843d7d15c7f3966a461deeeaff7fba4affected3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 to < d83b0c03ef8fbea2f03029a1cc1f5041f0e1d47faffected3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 to < 6871a676aa534e8f218279672e0445c725f81026affected3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 to < e6bba328578feb58c614c11868c259b40484c5faaffected3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 to < fe4a4fc179b7898055555a11685915473588392eaffected3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 to < ff9d61db59bb27d16d3f872bff2620d50856b80caffected3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 to < bd496a44f041da9ef3afe14d1d6193d460424e91affected
Linux Linux
Default version status: affected
5.0affected0 to < 5.0unaffected5.4.293 to ≤ 5.4.*unaffected5.10.237 to ≤ 5.10.*unaffected5.15.181 to ≤ 5.15.*unaffected6.1.135 to ≤ 6.1.*unaffected6.6.88 to ≤ 6.6.*unaffected6.12.24 to ≤ 6.12.*unaffected6.13.12 to ≤ 6.13.*unaffected6.14.3 to ≤ 6.14.*unaffected6.15 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/1b54faa5f47fa7c642179744aeff03f0810dc62e ↗
- https://git.kernel.org/stable/c/09359e7c8751961937cb5fc50220969b0a4e1058 ↗
- https://git.kernel.org/stable/c/3ba402610843d7d15c7f3966a461deeeaff7fba4 ↗
- https://git.kernel.org/stable/c/d83b0c03ef8fbea2f03029a1cc1f5041f0e1d47f ↗
- https://git.kernel.org/stable/c/6871a676aa534e8f218279672e0445c725f81026 ↗
- https://git.kernel.org/stable/c/e6bba328578feb58c614c11868c259b40484c5fa ↗
- https://git.kernel.org/stable/c/fe4a4fc179b7898055555a11685915473588392e ↗
- https://git.kernel.org/stable/c/ff9d61db59bb27d16d3f872bff2620d50856b80c ↗
- https://git.kernel.org/stable/c/bd496a44f041da9ef3afe14d1d6193d460424e91 ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html ↗