CVE-2021-47404

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

0.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 17.6% 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

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Low. 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

2026-05-11 13:54Z5 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-787Out-of-bounds WriteBase

Data version

5.2

Document digest

bb65757f7bbb6dfcc6028ada6ba249c79d3d6a536b4fbb86ffc0a26f7f7101d6

• git.kernel.orghttps://git.kernel.org/stable/c/a4faa7153b87fbcfe4be15f4278676f79ca6e019
• git.kernel.orghttps://git.kernel.org/stable/c/6fc4476dda58f6c00097c7ddec3b772513f57525
• git.kernel.orghttps://git.kernel.org/stable/c/1c83c38dec83d57bc18d0c01d82c413d3b34ccb9
• git.kernel.orghttps://git.kernel.org/stable/c/bb8b72374db69afa25a5b65cf1c092860c6fe914
• git.kernel.orghttps://git.kernel.org/stable/c/fe9bb925e7096509711660d39c0493a1546e9550
• git.kernel.orghttps://git.kernel.org/stable/c/dedfc35a2de2bae9fa3da8210a05bfd515f83fee
• git.kernel.orghttps://git.kernel.org/stable/c/708107b80aa616976d1c5fa60ac0c1390749db5e
• git.kernel.orghttps://git.kernel.org/stable/c/1e4ce418b1cb1a810256b5fb3fd33d22d1325993