CVE-2021-47055

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

0.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 9.7% 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

2024-02-29 22:37Z2 YR AGO

Last updated

2026-08-05 08:45Z1 MO AGO

Reserved

2024-02-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.1)

CNA CVSS vector

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

Weaknesses

• CWE-667Improper LockingClass
• CWE-266Incorrect Privilege AssignmentBase

Data version

5.2

Document digest

c89e2a838552d026c37eaf8a2ea08ece5f0d069ab46a873476c0b2ff48890d42

• git.kernel.orghttps://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcaf
• git.kernel.orghttps://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0
• git.kernel.orghttps://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424bee
• git.kernel.orghttps://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37
• git.kernel.orghttps://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981
• git.kernel.orghttps://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877e
• git.kernel.orghttps://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306b
• git.kernel.orghttps://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668
• git.kernel.orghttps://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366