CVE-2021-4442

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

0.39% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 32.4% 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

2024-08-29 09:05Z2 YR AGO

Last updated

2026-05-11 13:44Z3 MO AGO

Reserved

2024-08-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-20Improper Input ValidationClass

Data version

5.2

Document digest

50458c5b1bccae8de27affb0fb852445f4d7e5ce48caef5f8300a6a69f12d9a4

• git.kernel.orghttps://git.kernel.org/stable/c/319f460237fc2965a80aa9a055044e1da7b3692a
• git.kernel.orghttps://git.kernel.org/stable/c/3bf899438c123c444f6b644a57784dfbb6b15ad6
• git.kernel.orghttps://git.kernel.org/stable/c/046f3c1c2ff450fb7ae53650e9a95e0074a61f3e
• git.kernel.orghttps://git.kernel.org/stable/c/3b72d5a703842f582502d97906f17d6ee122dac2
• git.kernel.orghttps://git.kernel.org/stable/c/8811f4a9836e31c14ecdf79d9f3cb7c5d463265d