CVE-2021-47496

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

0.48% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 39.4% 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

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

2024-05-22 08:19Z2 YR AGO

Last updated

2026-08-05 08:48Z1 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-787Out-of-bounds WriteBase
• CWE-628Function Call with Incorrectly Specified ArgumentsBase

Data version

5.2

Document digest

bd3c6d95d977fe0f5677d0f183cb8df42f33039d256b449d1493a56ae41e1174

• git.kernel.orghttps://git.kernel.org/stable/c/e0cfd5159f314d6b304d030363650b06a2299cbb
• git.kernel.orghttps://git.kernel.org/stable/c/f3dec7e7ace38224f82cf83f0049159d067c2e19
• git.kernel.orghttps://git.kernel.org/stable/c/e41473543f75f7dbc5d605007e6f883f1bd13b9a
• git.kernel.orghttps://git.kernel.org/stable/c/da353fac65fede6b8b4cfe207f0d9408e3121105