CVE-2021-33630

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.34% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 27.3% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2024-01-18 15:00Z2 YR AGO

Last updated

2025-05-07 20:14Z1 YR AGO

Reserved

2021-05-28

Assigning CNA

openEuler

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.1

Document digest

d26986bdec7bc3d2c8d2731b5f3338b93e06fd6bd7aab2a2d2b202e8a5bef636

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