Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-47286

Severity CVSS v4.0:
Pending analysis
Type:
CWE-787 Out-of-bounds Write
Publication date:
21/05/2024
Last modified:
30/04/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bus: mhi: core: Validate channel ID when processing command completions<br /> <br /> MHI reads the channel ID from the event ring element sent by the<br /> device which can be any value between 0 and 255. In order to<br /> prevent any out of bound accesses, add a check against the maximum<br /> number of channels supported by the controller and those channels<br /> not configured yet so as to skip processing of that event ring<br /> element.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.7 (including) 5.10.54 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.13.6 (excluding)
cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools