CVE-2024-49977

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 6.6.58

Description: A zero-division error occurs in the Linux kernel when disabling tc cbs. The issue arises from the commit b8c43360f6e4, which allows the port transmit rate kbps to be set to 0. This value is then passed to the div s64 function when tc-cbs is disabled, leading to the error. The idleslope, sendslope, and credit values are not required to be configured when tc-cbs is disabled.

Recommendations: For Linux kernel versions prior to 6.6.58, update to version 6.6.58 or later to resolve the issue. As a temporary workaround, consider adding a return statement after setting the txQ mode to DCB when tc-cbs is disabled to prevent the zero-division error.