CVE-2021-46966

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

27/02/2024

Last modified:

06/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: custom_method: fix potential use-after-free issue In cm_write(), buf is always freed when reaching the end of the function. If the requested count is less than table.length, the allocated buffer will be freed but subsequent calls to cm_write() will still try to access it. Remove the unconditional kfree(buf) at the end of the function and set the buf to NULL in the -EINVAL error path to match the rest of function.

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::::::::	4.4.195 (including)	4.4.269 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.9.195 (including)	4.9.269 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.14.147 (including)	4.14.233 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.19.77 (including)	4.19.191 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.4 (including)	5.4.118 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.36 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.11.20 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.12 (including)	5.12.3 (excluding)

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

CVE-2021-46966

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools