CVE-2021-47337

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

Equal to or higher than the score of 14.9% 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

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 14:35Z2 YR AGO

Last updated

2026-05-23 15:19Z5 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-476NULL Pointer DereferenceBase
• CWE-253Incorrect Check of Function Return ValueBase

Data version

5.2

Document digest

4a7a511a50f471d8a789956291b69e836440787f94b3e3428f3c8913752edc35

• git.kernel.orghttps://git.kernel.org/stable/c/d2f0b960d07e52bb664471b4de0ed8b08c636b3a
• git.kernel.orghttps://git.kernel.org/stable/c/f3d0a109240c9bed5c60d819014786be3a2fe515
• git.kernel.orghttps://git.kernel.org/stable/c/e1bd3fac2baa3d5c04375980c1d5263a3335af92
• git.kernel.orghttps://git.kernel.org/stable/c/887bfae2732b5b02a86a859fd239d34f7ff93c05
• git.kernel.orghttps://git.kernel.org/stable/c/ea518b70ed5e4598c8d706f37fc16f7b06e440bd
• git.kernel.orghttps://git.kernel.org/stable/c/8e4212ecf0713dd57d0e3209a66201da582149b1
• git.kernel.orghttps://git.kernel.org/stable/c/c1671d2d2ef8a84837eea1b4d99ca0c6a66fb691
• git.kernel.orghttps://git.kernel.org/stable/c/93aa71ad7379900e61c8adff6a710a4c18c7c99b