CVE-2021-47361

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

21/05/2024

Last modified:

26/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved: mcb: fix error handling in mcb_alloc_bus() There are two bugs: 1) If ida_simple_get() fails then this code calls put_device(carrier) but we haven&#39;t yet called get_device(carrier) and probably that leads to a use after free. 2) After device_initialize() then we need to use put_device() to release the bus. This will free the internal resources tied to the device and call mcb_free_bus() which will free the rest.

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::::::::	4.7 (including)	4.9.285 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.10 (including)	4.14.249 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.15 (including)	4.19.209 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.150 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.70 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.14.9 (excluding)
cpe:2.3:o:linux:linux_kernel:5.15:rc1::::::
cpe:2.3:o:linux:linux_kernel:5.15:rc2::::::

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

CVE-2021-47361

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools