CVE-2026-89728
Description
In the Linux kernel, the following vulnerability has been resolved: i3c: renesas: Fix out-of-bounds access for newdevs mask When software initiates DAA (Dynamic Address Assignment), the controller reports the result via the NRSPQP (Normal Response Queue Port Register). The data length field of the response descriptor, which is accessible through the NRSPQP register, indicates the number of devices remaining after DAA. Consequently, when the bus is empty, this field contains the maximum number of devices supported by the controller (8 for the Renesas I3C controller). Adjust the condition that computes the newly discovered devices bitmask to prevent an out-of-bounds when the I3C bus is empty.
How to fix
- Linux Linux769f5a233efcf8587f70fb2244a202d88582c746, 50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | e7218986319b4e903dfb4642dcbd1087cf16aaec ≤ v < 769f5a233efcf8587f70fb2244a202d88582c746, e7218986319b4e903dfb4642dcbd1087cf16aaec ≤ v < 50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd, 7.0 | 769f5a233efcf8587f70fb2244a202d88582c746, 50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd |
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