CVE-2021-4441

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

0.22% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 13.3% 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

Analyzed. 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

2024-08-22 01:30Z2 YR AGO

Last updated

2026-05-11 13:44Z3 MO AGO

Reserved

2024-08-22

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

73d6a4b972359642437517489001405bf6b34fc1baa41129d60d4529ec026ec7

• git.kernel.orghttps://git.kernel.org/stable/c/df14d2bed8e2455878e046e67123d9ecb2e79056
• git.kernel.orghttps://git.kernel.org/stable/c/2efece1368aeee2d2552c7ec36aeb676c4d4c95f
• git.kernel.orghttps://git.kernel.org/stable/c/3c32405d6474a21f7d742828e73c13e326dcae82
• git.kernel.orghttps://git.kernel.org/stable/c/b9dd08cbebe0c593c49bf86d2012a431494e54cb
• git.kernel.orghttps://git.kernel.org/stable/c/ab3824427b848da10e9fe2727f035bbeecae6ff4