NULL Pointer Dereference vulnerability in openEuler kernel on Linux (network modules) allows Pointer Manipulation. This vulnerability is associated with program files net/sched/sch_cbs.C. This issue affects openEuler kernel: from 4.19.90 before 4.19.90-2401.3. CREATE(Triage):(User=admin) CVE-2021-33630 (https://nvd.nist.gov/vuln/detail/CVE-2021-33630)