CVE-2021-47588

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

0.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 17.9% 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

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

2024-06-19 14:53Z2 YR AGO

Last updated

2026-08-05 08:48Z2 MO AGO

Reserved

2024-05-24

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-911Improper Update of Reference CountBase

Data version

5.2

Document digest

997f18aba3f64d4c724139dacfcd57eeeadad225105f65885aa3ddd6369cb49c

• git.kernel.orghttps://git.kernel.org/stable/c/4e1797914d8f223726ff6ae5ece4f97d73f21bab
• git.kernel.orghttps://git.kernel.org/stable/c/e56b65c1e74d7f706d74b51baba15187be2fb4b5
• git.kernel.orghttps://git.kernel.org/stable/c/ad0ed314d6167b212939e3839428ba0c8bb16adb
• git.kernel.orghttps://git.kernel.org/stable/c/6f46c59e60b64620d5d386c8ee2eaa11ebe3b595
• git.kernel.orghttps://git.kernel.org/stable/c/44a6c846bc3a7efe7d394bab8b2ae3b7f580e190
• git.kernel.orghttps://git.kernel.org/stable/c/e28587cc491ef0f3c51258fdc87fbc386b1d4c59