CVE-2021-47500

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 15.5% of scored records. A rank, not a probability.

NVD base score

7.8 (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:H/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

2024-05-24 15:01Z2 YR AGO

Last updated

2026-08-05 08:48Z1 MO AGO

Reserved

2024-05-22

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-416Use After FreeVariant
• CWE-911Improper Update of Reference CountBase

Data version

5.2

Document digest

9cc348f9b16024e3b1a92e01adee9d8f7295bee69e6aeb267845fa3b17b95788

• git.kernel.orghttps://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba
• git.kernel.orghttps://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96
• git.kernel.orghttps://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb
• git.kernel.orghttps://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8
• git.kernel.orghttps://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e
• git.kernel.orghttps://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1
• git.kernel.orghttps://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739
• git.kernel.orghttps://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892