CVE-2021-47393

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

0.24% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 15.8% of scored records. A rank, not a probability.

NVD base score

7.1 (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:H/I:N/A:H

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

2024-05-21 15:03Z2 YR AGO

Last updated

2026-05-11 13:53Z3 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-125Out-of-bounds ReadBase
• CWE-754Improper Check for Unusual or Exceptional ConditionsClass

Data version

5.2

Document digest

e6b507e95916ecc7c42f220be143b79898b89acc0764ab9383748f80aaf31c68

• git.kernel.orghttps://git.kernel.org/stable/c/5c6e0bce647d9cb32a17d58ffa669b3421fcc6ca
• git.kernel.orghttps://git.kernel.org/stable/c/a6c42ae1530f94724d3c42cf91fe3d3c5e394f8a
• git.kernel.orghttps://git.kernel.org/stable/c/76bbb482d33bfcd7e9070ecf594c9ec73e01c930
• git.kernel.orghttps://git.kernel.org/stable/c/aa85fb7bde558bb2e364e85976b14b259c8b6fe8
• git.kernel.orghttps://git.kernel.org/stable/c/e6fab7af6ba1bc77c78713a83876f60ca7a4a064