CVE-2021-47405

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

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 16.2% 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

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

2024-05-21 15:03Z2 YR AGO

Last updated

2026-05-11 13:54Z5 MO AGO

Reserved

2024-05-21

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-401Missing Release of Memory after Effective LifetimeVariant
• CWE-402Transmission of Private Resources into a New Sphere ('Resource Leak')Class

Data version

5.2

Document digest

cd3f698152b19753d612ca21b6857c88c98f46317715c286d582a04f54028647

• git.kernel.orghttps://git.kernel.org/stable/c/7ce4e49146612261265671b1d30d117139021030
• git.kernel.orghttps://git.kernel.org/stable/c/efc5c8d29256955cc90d8d570849b2d6121ed09f
• git.kernel.orghttps://git.kernel.org/stable/c/c3156fea4d8a0e643625dff69a0421e872d1fdae
• git.kernel.orghttps://git.kernel.org/stable/c/764ac04de056801dfe52a716da63f6e7018e7f3b
• git.kernel.orghttps://git.kernel.org/stable/c/965147067fa1bedff3ae1f07ce3f89f1a14d2df3
• git.kernel.orghttps://git.kernel.org/stable/c/f7ac4d24e1610b92689946fa88177673f1e88a3f
• git.kernel.orghttps://git.kernel.org/stable/c/2b704864c92dcec2b295f276fcfbfb81d9831f81
• git.kernel.orghttps://git.kernel.org/stable/c/f7744fa16b96da57187dc8e5634152d3b63d72de