CVE-2021-47197

A flaw was found in the Linux kernel's Mellanox network driver (mlx5). This issue allows a local user to cause a Denial of Service (DoS) by triggering a kernel crash. The vulnerability occurs when a completion queue destruction fails, leaving an uncleared debug pointer that is improperly referenced during subsequent cleanup operations.

This vulnerability is rated as Low impact because it requires local access on systems equipped with Mellanox hardware and only leads to a denial of service. The issue manifests during an uncommon error path where a completion queue fails to terminate properly, resulting in a kernel panic upon subsequent teardown attempts. Typical Red Hat Enterprise Linux environments not utilizing Mellanox network controllers or InfiniBand devices remain unaffected by this flaw.

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.