CVE-2021-47506

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 ImpacttotalSuccessful exploitation gives total 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

0.78% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 55.5% 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 08:48Z2 MO AGO

Reserved

2024-05-22

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-416Use After FreeVariant

Data version

5.2

Document digest

292fec1caa33499678abb680f876b7fa94a257d8dcf2a8a5bc9896d86fac53e9

• git.kernel.orghttps://git.kernel.org/stable/c/04a8d07f3d58308b92630045560799a3faa3ebce
• git.kernel.orghttps://git.kernel.org/stable/c/348714018139c39533c55661a0c7c990671396b4
• git.kernel.orghttps://git.kernel.org/stable/c/33645d3e22720cac1e4548f8fef57bf0649536ee
• git.kernel.orghttps://git.kernel.org/stable/c/2becaa990b93cbd2928292c0b669d3abb6cf06d4
• git.kernel.orghttps://git.kernel.org/stable/c/e0759696de6851d7536efddfdd2dfed4c4df1f09
• git.kernel.orghttps://git.kernel.org/stable/c/eeb0711801f5e19ef654371b627682aed3b11373
• git.kernel.orghttps://git.kernel.org/stable/c/148c816f10fd11df27ca6a9b3238cdd42fa72cd3
• git.kernel.orghttps://git.kernel.org/stable/c/548ec0805c399c65ed66c6641be467f717833ab5