CVE-2026-89728 is a vulnerability in Linux Kernel
Published on September 11, 2026
i3c: renesas: Fix out-of-bounds access for newdevs mask
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.
Products Associated with CVE-2026-89728
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Affected Versions
Linux:- Version e7218986319b4e903dfb4642dcbd1087cf16aaec and below 769f5a233efcf8587f70fb2244a202d88582c746 is affected.
- Version e7218986319b4e903dfb4642dcbd1087cf16aaec and below 50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd is affected.
- Version 7.0 is affected.
- Before 7.0 is unaffected.
- Version 7.2.4, <= 7.2.* is unaffected.
- Version 7.3-rc1, <= * is unaffected.