CVE-2021-47657

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

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 19.5% 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 2026-06-17.

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

2025-02-26 01:54Z1 YR AGO

Last updated

2026-05-23 15:20Z3 MO AGO

Reserved

2025-02-26

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

d5eec75a4b467576667543558f9ad87644456eebe9c77f8da4f6f4bcdb23097e

• git.kernel.orghttps://git.kernel.org/stable/c/b094fece3810c71ceee6f0921676cb65d4e68c5a
• git.kernel.orghttps://git.kernel.org/stable/c/ac92b474eeeed75b8660374ba1d129a121c09da8
• git.kernel.orghttps://git.kernel.org/stable/c/abc9ad36df16e27ac1c665085157f1a082d39bac
• git.kernel.orghttps://git.kernel.org/stable/c/6b79f96f4a23846516e5e6e4dd37fc06f43a60dd