CVE-2026-43352

A flaw was found in the Linux kernel's I3C (Improved Inter-Integrated Circuit) Host Controller Interface (HCI) driver. Incorrect handling of DMA (Direct Memory Access) ring aborts can lead to the unintentional clearing of RING_CTRL_ENABLE. This action resets hardware ring pointers and disrupts the controller's state, potentially causing system instability or a denial of service.

Red Hat acknowledges the upstream Linux kernel correction for «i3c» as described in COMMENT_ZERO. Fixes are delivered through standard kernel errata for supported products. Operational exposure depends on whether this subsystem or driver is active in your configuration.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, prevent the i3c_mipi_i3c_hci module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.