CVE-2021-47635

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

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

EPSS percentile

Ranks above 17.0% 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

2025-02-26 01:54Z1 YR AGO

Last updated

2026-08-05 08:48Z1 MO AGO

Reserved

2025-02-26

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

• CWE-911Improper Update of Reference CountBase

Data version

5.2

Document digest

39cbe9c0e5be331045805fa4e4601fa5f148e695f7c7f9d9b326c18839e8e9bf

• git.kernel.orghttps://git.kernel.org/stable/c/c34ae24a2590fee96a3a7735ba2fa6cc52306221
• git.kernel.orghttps://git.kernel.org/stable/c/4f75bab98565afd4f905059c56ec4caba88a7eec
• git.kernel.orghttps://git.kernel.org/stable/c/5aaa2c0f0052b02c4a982993d4c5bb68fb7cbe22
• git.kernel.orghttps://git.kernel.org/stable/c/fbeb2139eed65e929ce806c6468e6601ade01b1b
• git.kernel.orghttps://git.kernel.org/stable/c/3b67db8a6ca83e6ff90b756d3da0c966f61cd37b