5.5
MEDIUM
CVE-2021-33630
openEuler kernel NULL Pointer Dereference in network modules
Description

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.

INFO

Published Date :

Jan. 18, 2024, 3:15 p.m.

Last Modified :

April 2, 2025, 6:33 p.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2021-33630 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Huawei openeuler
1 Openatom openeuler
: Total Affected Vendor : 2 | Products : 2
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-33630.

URL Resource
http://www.openwall.com/lists/oss-security/2024/01/30/10
http://www.openwall.com/lists/oss-security/2024/01/30/3
http://www.openwall.com/lists/oss-security/2024/01/30/4
http://www.openwall.com/lists/oss-security/2024/01/30/5
http://www.openwall.com/lists/oss-security/2024/01/30/9
http://www.openwall.com/lists/oss-security/2024/01/31/2
http://www.openwall.com/lists/oss-security/2024/01/31/3
http://www.openwall.com/lists/oss-security/2024/02/02/6
http://www.openwall.com/lists/oss-security/2024/02/02/9
http://www.openwall.com/lists/oss-security/2024/02/03/1
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e8b9bfa110896f95d602d8c98d5f9d67e41d78c
https://gitee.com/src-openeuler/kernel/pulls/1389 Release Notes
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1030 Vendor Advisory
https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1031 Vendor Advisory
http://www.openwall.com/lists/oss-security/2024/01/30/10
http://www.openwall.com/lists/oss-security/2024/01/30/3
http://www.openwall.com/lists/oss-security/2024/01/30/4
http://www.openwall.com/lists/oss-security/2024/01/30/5
http://www.openwall.com/lists/oss-security/2024/01/30/9
http://www.openwall.com/lists/oss-security/2024/01/31/2
http://www.openwall.com/lists/oss-security/2024/01/31/3
http://www.openwall.com/lists/oss-security/2024/02/02/6
http://www.openwall.com/lists/oss-security/2024/02/02/9
http://www.openwall.com/lists/oss-security/2024/02/03/1
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e8b9bfa110896f95d602d8c98d5f9d67e41d78c
https://gitee.com/src-openeuler/kernel/pulls/1389 Release Notes
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1030 Vendor Advisory
https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1031 Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-33630 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-33630 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CPE Deprecation Remap by [email protected]

    Apr. 02, 2025

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:huawei:openeuler:*:*:*:*:-:*:*:* versions from (including) 4.19.90 from (excluding) 4.19.90-2401.3 OR *cpe:2.3:o:openatom:openeuler:*:*:*:*:-:*:*:* versions from (including) 4.19.90 from (excluding) 4.19.90-2401.3
  • CVE Modified by [email protected]

    Feb. 13, 2025

    Action Type Old Value New Value
    Changed Description 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. 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.
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2024/01/30/10
    Added Reference http://www.openwall.com/lists/oss-security/2024/01/30/3
    Added Reference http://www.openwall.com/lists/oss-security/2024/01/30/4
    Added Reference http://www.openwall.com/lists/oss-security/2024/01/30/5
    Added Reference http://www.openwall.com/lists/oss-security/2024/01/30/9
    Added Reference http://www.openwall.com/lists/oss-security/2024/01/31/2
    Added Reference http://www.openwall.com/lists/oss-security/2024/01/31/3
    Added Reference http://www.openwall.com/lists/oss-security/2024/02/02/6
    Added Reference http://www.openwall.com/lists/oss-security/2024/02/02/9
    Added Reference http://www.openwall.com/lists/oss-security/2024/02/03/1
    Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e8b9bfa110896f95d602d8c98d5f9d67e41d78c
    Added Reference https://gitee.com/src-openeuler/kernel/pulls/1389
    Added Reference https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
    Added Reference https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1030
    Added Reference https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1031
  • CVE Modified by [email protected]

    Jun. 27, 2024

    Action Type Old Value New Value
    Added Reference openEuler https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html [No types assigned]
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Feb. 03, 2024

    Action Type Old Value New Value
    Added Reference openEuler http://www.openwall.com/lists/oss-security/2024/02/03/1 [No types assigned]
  • CVE Modified by [email protected]

    Feb. 03, 2024

    Action Type Old Value New Value
    Added Reference openEuler http://www.openwall.com/lists/oss-security/2024/02/02/9 [No types assigned]
  • CVE Modified by [email protected]

    Feb. 02, 2024

    Action Type Old Value New Value
    Added Reference openEuler http://www.openwall.com/lists/oss-security/2024/02/02/6 [No types assigned]
  • CVE Modified by [email protected]

    Jan. 31, 2024

    Action Type Old Value New Value
    Added Reference openEuler http://www.openwall.com/lists/oss-security/2024/01/31/3 [No types assigned]
    Added Reference openEuler http://www.openwall.com/lists/oss-security/2024/01/31/2 [No types assigned]
  • CVE Modified by [email protected]

    Jan. 31, 2024

    Action Type Old Value New Value
    Added Reference openEuler http://www.openwall.com/lists/oss-security/2024/01/30/9 [No types assigned]
    Added Reference openEuler http://www.openwall.com/lists/oss-security/2024/01/30/10 [No types assigned]
  • CVE Modified by [email protected]

    Jan. 30, 2024

    Action Type Old Value New Value
    Added Reference openEuler http://www.openwall.com/lists/oss-security/2024/01/30/5 [No types assigned]
  • CVE Modified by [email protected]

    Jan. 30, 2024

    Action Type Old Value New Value
    Added Reference openEuler http://www.openwall.com/lists/oss-security/2024/01/30/3 [No types assigned]
    Added Reference openEuler http://www.openwall.com/lists/oss-security/2024/01/30/4 [No types assigned]
  • CVE Modified by [email protected]

    Jan. 26, 2024

    Action Type Old Value New Value
    Added Reference openEuler https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e8b9bfa110896f95d602d8c98d5f9d67e41d78c [No types assigned]
  • Initial Analysis by [email protected]

    Jan. 25, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://gitee.com/src-openeuler/kernel/pulls/1389 No Types Assigned https://gitee.com/src-openeuler/kernel/pulls/1389 Release Notes
    Changed Reference Type https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1030 No Types Assigned https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1030 Vendor Advisory
    Changed Reference Type https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1031 No Types Assigned https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1031 Vendor Advisory
    Added CWE NIST CWE-476
    Added CPE Configuration OR *cpe:2.3:o:huawei:openeuler:*:*:*:*:-:*:*:* versions from (including) 4.19.90 up to (excluding) 4.19.90-2401.3
  • CVE Received by [email protected]

    Jan. 18, 2024

    Action Type Old Value New Value
    Added Description 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.
    Added Reference openEuler https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1030 [No types assigned]
    Added Reference openEuler https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1031 [No types assigned]
    Added Reference openEuler https://gitee.com/src-openeuler/kernel/pulls/1389 [No types assigned]
    Added CWE openEuler CWE-476
    Added CVSS V3.1 openEuler AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-33630 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-33630 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.05 }} 0.02%

score

0.13616

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: