openEuler kernel NULL Ptr Deref in net/sched/sch_cbs.C before 4.19.90-2401.3
CVE-2021-33630 Published on January 18, 2024
NULL-ptr-deref in network sched
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.
Vulnerability Analysis
CVE-2021-33630 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
NULL Pointer Dereference
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.
Products Associated with CVE-2021-33630
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Affected Versions
openEuler kernel:- Version 4.19.90 and below 4.19.90-2401.3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.