CVE-2023-53811

A bounds checking flaw was found in the Intel RDMA (irdma) driver in the Linux kernel. The driver may request more MSIX vectors than online CPUs allow, then attempt to set CPU affinity hints with an invalid CPU mask. This triggers kernel warnings and could cause instability.

This affects Intel Ethernet adapters with RDMA capability (E810, etc.). The bug causes kernel warnings during driver initialization when MSIX vector count exceeds online CPU count plus one.

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 irdma module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.