CVE-2021-47547

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

0.23% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 14.1% of scored records. A rank, not a probability.

NVD base score

4.4 (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:L/A:L

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

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

2024-05-24 15:09Z2 YR AGO

Last updated

2026-05-11 13:56Z5 MO AGO

Reserved

2024-05-24

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 4.4)

CNA CVSS vector

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

Weaknesses

• CWE-129Improper Validation of Array IndexVariant
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

33fd1d83b8e0b342616f4131dd9595f92e9ac8bcc222b7c431fc63cbb537b704

• git.kernel.orghttps://git.kernel.org/stable/c/ec5bd0aef1cec96830d0c7e06d3597d9e786cc98
• git.kernel.orghttps://git.kernel.org/stable/c/142ead3dc70411bd5977e8c47a6d8bf22287b3f8
• git.kernel.orghttps://git.kernel.org/stable/c/d3dedaa5a601107cfedda087209772c76e364d58
• git.kernel.orghttps://git.kernel.org/stable/c/2c1a6a9a011d622a7c61324a97a49801ba425eff
• git.kernel.orghttps://git.kernel.org/stable/c/77ff166909458646e66450e42909e0adacc99049
• git.kernel.orghttps://git.kernel.org/stable/c/f059fa40f0fcc6bc7a12e0f2a2504e9a4ff74f1f
• git.kernel.orghttps://git.kernel.org/stable/c/12f907cb11576b8cd0b1d95a16d1f10ed5bb7237
• git.kernel.orghttps://git.kernel.org/stable/c/61217be886b5f7402843677e4be7e7e83de9cb41