CVE-2021-47400

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

Ranks above 17.0% 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

Modified. NVD last modified this record on 2026-08-04.

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

2024-05-21 15:03Z2 YR AGO

Last updated

2026-08-05 08:47Z1 MO AGO

Reserved

2024-05-21

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-664Improper Control of a Resource Through its LifetimePillar

Data version

5.2

Document digest

e984e409ac3c83997a8b1a95051252fd8c180b07573e22ac494ca6d7a2322fa1

• git.kernel.orghttps://git.kernel.org/stable/c/5a31d4e73ada8022427b69b10fd1f01a6a8d4b3d
• git.kernel.orghttps://git.kernel.org/stable/c/f8ba689cb69523144d10606096ef686002dd7285
• git.kernel.orghttps://git.kernel.org/stable/c/3dac38bdce7932901b9f0b71c62331852c809e61
• git.kernel.orghttps://git.kernel.org/stable/c/5b09e88e1bf7fe86540fab4b5f3eece8abead39e