CVE-2021-47440

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

0.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 11.7% of scored records. A rank, not a probability.

NVD base score

2.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

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

2024-05-22 06:19Z2 YR AGO

Last updated

2026-05-11 13:54Z5 MO AGO

Reserved

2024-05-21

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Low (CVSS 2.3)

CNA CVSS vector

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

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

3b570bac3888878eda4bd5a768f327b090c497a2b9d430b139705d0e86180c1f

• git.kernel.orghttps://git.kernel.org/stable/c/66358471fa75a713fd76bc8a4bd74cb14cd50a4f
• git.kernel.orghttps://git.kernel.org/stable/c/f043fac1133a6c5ef960a8422c0f6dd711dee462
• git.kernel.orghttps://git.kernel.org/stable/c/fddc7f678d7fb93caa0d7bc512f968ff1e2bddbc
• git.kernel.orghttps://git.kernel.org/stable/c/5e5494e6fc8a29c927e0478bec4a078a40da8901
• git.kernel.orghttps://git.kernel.org/stable/c/4c2eb80fc90b05559ce6ed1b8dfb2348420b5644
• git.kernel.orghttps://git.kernel.org/stable/c/e19c10d6e07c59c96e90fe053a72683ad8b0397e
• git.kernel.orghttps://git.kernel.org/stable/c/322c0e53496309e634d9db7349678eaad1d25b55
• git.kernel.orghttps://git.kernel.org/stable/c/f03dca0c9e2297c84a018e306f8a9cd534ee4287