CVE-2022-50679

A DMA mapping leak vulnerability was found in the Intel i40e network driver in the Linux kernel. During reallocation of RX buffers when changing ring parameters via ethtool, DMA mappings are not properly cleaned up before creating new ones. Repeated ring size changes can exhaust DMA resources, leading to memory allocation failures and kernel warnings when XDP queue information cannot be unregistered properly.

This is a resource leak in the Intel i40e network driver that can be triggered by repeatedly changing ring buffer sizes via ethtool. The impact is limited to systems with Intel Ethernet 700 Series adapters and requires root-level access to modify network device parameters.

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.