i3c: renesas: Fix out-of-bounds access for newdevs mask

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89728
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:20:03 UTC
Updated2026-09-11 20:20:03 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e7218986319b4e903dfb4642dcbd1087cf16aaec 769f5a233efcf8587f70fb2244a202d88582c746 git Not specified
CNA Linux Linux affected e7218986319b4e903dfb4642dcbd1087cf16aaec 50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd git Not specified
CNA Linux Linux affected 7.0 Not specified
CNA Linux Linux unaffected 7.0 semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/769f5a233efcf8587f70fb2244a202d88582c746 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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