CVE-2021-47320

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

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 17.3% 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

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 14:35Z2 YR AGO

Last updated

2026-05-11 13:52Z5 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-401Missing Release of Memory after Effective LifetimeVariant
• CWE-402Transmission of Private Resources into a New Sphere ('Resource Leak')Class

Data version

5.2

Document digest

ad9c94356723f16026016eef566c3159ad2c93f6efd80a10ac344fab6b45dd5a

• git.kernel.orghttps://git.kernel.org/stable/c/2e3960f276b4574a9bb0dfa31a7497302f6363b2
• git.kernel.orghttps://git.kernel.org/stable/c/cef9d9acb7c80ed6bace894b6334557fd493863b
• git.kernel.orghttps://git.kernel.org/stable/c/8a2b308a54c5ec224fedc753617f99b29ffcd883
• git.kernel.orghttps://git.kernel.org/stable/c/0704f617040c397ae73c1f88f3956787ec5d6529
• git.kernel.orghttps://git.kernel.org/stable/c/d0b32dc1409f7e65e4fcc34e236462268e69a357
• git.kernel.orghttps://git.kernel.org/stable/c/4b515308ab875c7e8ada8e606fe0c64762da5ed4
• git.kernel.orghttps://git.kernel.org/stable/c/c8fc86e9df6a6a03f5a8e15a3b7a5c75fd05aa38
• git.kernel.orghttps://git.kernel.org/stable/c/687cf32865b2d6960214bce523f2afac58dd3cd2
• git.kernel.orghttps://git.kernel.org/stable/c/1fcb6fcd74a222d9ead54d405842fc763bb86262