CVE-2026-98903

A flaw was found in the Linux kernel's i.MX Messaging Unit (MU) mailbox driver. A local user could exploit a race condition during channel shutdown to cause a Denial of Service (DoS). When a mailbox channel is closed while an interrupt is actively being processed, the receive event can be inadvertently re-enabled after shutdown. On systems with shared interrupt lines, subsequent unhandled interrupts can prompt the kernel to shut down the interrupt line, disrupting dependent hardware services.

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.