CVE-2021-4454

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

0.57% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 44.5% 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 2026-08-04.

Red Hat severity

Low. 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

2025-03-27 16:37Z1 YR AGO

Last updated

2026-08-05 08:44Z1 MO AGO

Reserved

2025-02-26

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-20Improper Input ValidationClass

Data version

5.2

Document digest

df8b3cc6828f2d2b1e91d7efaf1a2870f3d3e82f07e4fe5befbe27f2e50989a4

• git.kernel.orghttps://git.kernel.org/stable/c/6950df42a03c9ac9290503ced3f371199cb68fa9
• git.kernel.orghttps://git.kernel.org/stable/c/b6d44072117bba057d50f7a2f96e5d070c65926d
• git.kernel.orghttps://git.kernel.org/stable/c/9ab896775f98ff54b68512f345eed178bf961084
• git.kernel.orghttps://git.kernel.org/stable/c/1740a1e45eee65099a92fb502e1e67e63aad277d
• git.kernel.orghttps://git.kernel.org/stable/c/d0553680f94c49bbe0e39eb50d033ba563b4212d