CVE-2021-47397

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

0.77% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 53.0% 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

2024-05-21 15:03Z2 YR AGO

Last updated

2026-08-05 08:47Z1 MO AGO

Reserved

2024-05-21

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

fe4fa4477e2651d0a931d0031db1fbad4ed70f2df92f71e687b8e250589f1cc5

• git.kernel.orghttps://git.kernel.org/stable/c/77bc7dcf0fcc1519341a91788d7a2914fcfddf6d
• git.kernel.orghttps://git.kernel.org/stable/c/8c630a7b4f9dec63f08bd881ab77984a724a5124
• git.kernel.orghttps://git.kernel.org/stable/c/ec018021cf445abbe8e2f3e2a7f1dcc813cb8ea1
• git.kernel.orghttps://git.kernel.org/stable/c/9c6591ae8e63f93c895ad5e2703c36c548aac997
• git.kernel.orghttps://git.kernel.org/stable/c/8180611c238e11676612eb2a9828b1c7a3a4d77b
• git.kernel.orghttps://git.kernel.org/stable/c/f7e745f8e94492a8ac0b0a26e25f2b19d342918f