Key Information Vulnerability Description In the function, which uses as a termination condition, if a class with ID is created, the traversal terminates prematurely, leading to incorrect parent statistics. In the case of DRR (Deficit Round Robin), this could result in a crash. Mitigation Prevent the creation of any qdisc class with class ID (0xFFFFFFFF) across all qdisc types. Related Commits and Links Upstream commit: Fixing commit: Related link: Code Changes File: Added a check to prevent creation of traffic classes with ID , returning error code.