CVE-2021-47409

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

0.24% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 15.7% 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 15:04Z2 YR AGO

Last updated

2026-05-11 13:54Z3 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-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

47d25d9f1790d2fff8636ccdb4af2b4da678e1a6fb8c5a8a1e7bc0e693eb6fa2

• git.kernel.orghttps://git.kernel.org/stable/c/4b7f4a0eb92bf37bea4cd838c7f83ea42823ca8b
• git.kernel.orghttps://git.kernel.org/stable/c/a7182993dd8e09f96839ddc3ac54f9b37370d282
• git.kernel.orghttps://git.kernel.org/stable/c/8b9c1c33e51d0959f2aec573dfbac0ffd3f5c0b7
• git.kernel.orghttps://git.kernel.org/stable/c/2754fa3b73df7d0ae042f3ed6cfd9df9042f6262
• git.kernel.orghttps://git.kernel.org/stable/c/337f00a0bc62d7cb7d10ec0b872c79009a1641df
• git.kernel.orghttps://git.kernel.org/stable/c/856e6e8e0f9300befa87dde09edb578555c99a82