CVE-2021-47055

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

29/02/2024

Last modified:

09/01/2025

Description

In the Linux kernel, the following vulnerability has been resolved: mtd: require write permissions for locking and badblock ioctls MEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require write permission. Depending on the hardware MEMLOCK might even be write-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK is always write-once. MEMSETBADBLOCK modifies the bad block table.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	4.4.233 (including)	4.4.269 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.9.233 (including)	4.9.269 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.14.194 (including)	4.14.233 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.19.139 (including)	4.19.191 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.4.58 (including)	5.4.119 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.9 (including)	5.10.37 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.11.21 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.12 (including)	5.12.4 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-47055

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools