CVE-2021-47476

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

22/05/2024

Last modified:

02/04/2025

Description

In the Linux kernel, the following vulnerability has been resolved: comedi: ni_usb6501: fix NULL-deref in command paths The driver uses endpoint-sized USB transfer buffers but had no sanity checks on the sizes. This can lead to zero-size-pointer dereferences or overflowed transfer buffers in ni6501_port_command() and ni6501_counter_command() if a (malicious) device has smaller max-packet sizes than expected (or when doing descriptor fuzz testing). Add the missing sanity checks to probe().

Impact

Vector 3.x

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

Base Score: 4.60 MEDIUM
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x

4.60

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	3.18 (including)	4.4.292 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.5 (including)	4.9.290 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.10 (including)	4.14.255 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.15 (including)	4.19.217 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.159 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.79 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.14.18 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.15 (including)	5.15.2 (excluding)

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

CVE-2021-47476

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools