CVE-2021-47387

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 13:53Z5 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-763Release of Invalid Pointer or ReferenceBase

Data version

5.2

Document digest

62550f1cdc38bac576f70d955e954f76029df66bc15c39a2fc9c6340ef77bd24

• git.kernel.orghttps://git.kernel.org/stable/c/cb4a53ba37532c861a5f3f22803391018a41849a
• git.kernel.orghttps://git.kernel.org/stable/c/463c46705f321201090b69c4ad5da0cd2ce614c9
• git.kernel.orghttps://git.kernel.org/stable/c/30d57cf2c4116ca6d34ecd1cac94ad84f8bc446c
• git.kernel.orghttps://git.kernel.org/stable/c/67c98e023135ff81b8d52998a6fdb8ca0c518d82
• git.kernel.orghttps://git.kernel.org/stable/c/a7d4fc84404d45d72f4490417e8cc3efa4af93f1
• git.kernel.orghttps://git.kernel.org/stable/c/8d62aec52a8c5b1d25a2364b243fcc5098a2ede9
• git.kernel.orghttps://git.kernel.org/stable/c/e5c6b312ce3cc97e90ea159446e6bfa06645364d