CVE-2021-47328

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 54.9% 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

2024-05-21 14:35Z2 YR AGO

Last updated

2026-08-05 08:47Z2 MO AGO

Reserved

2024-05-21

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

f9df282c7a9fe08131f8c5bd07a1072338227a8f5914ca39b0e0c2fe61b2d1db

• git.kernel.orghttps://git.kernel.org/stable/c/bf20d85a88384574fabb3d53ad62a8af57e7ab11
• git.kernel.orghttps://git.kernel.org/stable/c/d04958a348e560938410e04a12fb99da9c7e6a00
• git.kernel.orghttps://git.kernel.org/stable/c/89812e7957ab0746eab66ed6fc49d52bb4dca250
• git.kernel.orghttps://git.kernel.org/stable/c/f0a031f7c55ffd944fead1ddaf2aa94df9a158c1
• git.kernel.orghttps://git.kernel.org/stable/c/fa9542b35ceb4202e8f8d65f440529a63524dca9
• git.kernel.orghttps://git.kernel.org/stable/c/ec29d0ac29be366450a7faffbcf8cba3a6a3b506