CVE-2021-47168

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

0.76% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 55.2% 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

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

2024-03-25 09:16Z2 YR AGO

Last updated

2026-08-05 08:46Z2 MO AGO

Reserved

2024-03-25

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-787Out-of-bounds WriteBase
• CWE-99Improper Control of Resource Identifiers ('Resource Injection')Class

Data version

5.2

Document digest

dd3e1471ab04611dcba93938e1e7ed9b879e24da9840fe9d10f9089313774bd6

• git.kernel.orghttps://git.kernel.org/stable/c/9d280ab53df1d4a1043bd7a9e7c6a2f9cfbfe040
• git.kernel.orghttps://git.kernel.org/stable/c/b287521e9e94bb342ebe5fd8c3fd7db9aef4e6f1
• git.kernel.orghttps://git.kernel.org/stable/c/f299522eda1566cbfbae4b15c82970fc41b03714
• git.kernel.orghttps://git.kernel.org/stable/c/945ebef997227ca8c20bad7f8a8358c8ee57a84a
• git.kernel.orghttps://git.kernel.org/stable/c/e411df81cd862ef3d5b878120b2a2fef0ca9cdb1
• git.kernel.orghttps://git.kernel.org/stable/c/9b367fe770b1b80d7bf64ed0d177544a44405f6e
• git.kernel.orghttps://git.kernel.org/stable/c/d34fb628f6ef522f996205a9e578216bbee09e84
• git.kernel.orghttps://git.kernel.org/stable/c/769b01ea68b6c49dc3cde6adf7e53927dacbd3a8