CVE-2021-33912

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

9.64% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 95.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2022-01-19 00:00Z4 YR AGO

Last updated

2024-08-04 00:05Z2 YR AGO

Reserved

2021-06-07

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

681b74b41372f5f479bef28d6f2c855a950f7e479f22e7349b8e4ee40dd3e411

• github.comhttps://github.com/shevek/libspf2/tree/8131fe140704eaae695e76b5cd09e39bd1dd220b
• nathanielbennett.comhttps://nathanielbennett.com/blog/libspf2-cve-jan-2022-disclosure
• lists.debian.org[debian-lts-announce] 20220121 [SECURITY] [DLA 2890-1] libspf2 security updatehttps://lists.debian.org/debian-lts-announce/2022/01/msg00015.htmlmailing-list
• security.gentoo.orgGLSA-202401-22https://security.gentoo.org/glsa/202401-22vendor-advisory