CVE-2021-47203

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

0.34% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 27.2% 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

2024-04-10 18:56Z2 YR AGO

Last updated

2026-08-05 08:46Z1 MO AGO

Reserved

2024-03-25

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

• CWE-787Out-of-bounds WriteBase
• CWE-20Improper Input ValidationClass

Data version

5.2

Document digest

4244565564edcf154a4d9ba361180c85786ef370cdc4329fba6fabf27a81906f

• git.kernel.orghttps://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674dd
• git.kernel.orghttps://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8f
• git.kernel.orghttps://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305
• git.kernel.orghttps://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9b
• git.kernel.orghttps://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08f
• git.kernel.orghttps://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fca
• git.kernel.orghttps://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5
• git.kernel.orghttps://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5d