CVE-2021-47556

A vulnerability was found in the Linux kernel's ethtool implementation in the ioctl handling of coalesce settings, where the system attempts to change coalesce settings using the ethtool_set_coalesce() function without verifying the availability of both the .get_coalesce() and .set_coalesce() callbacks, leading to a potential NULL pointer dereference causing system instability and crashes during network operations.

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.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.