CVE-2021-47239

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

21/05/2024

Last modified:

30/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: fix possible use-after-free in smsc75xx_bind The commit 46a8b29c6306 ("net: usb: fix memory leak in smsc75xx_bind") fails to clean up the work scheduled in smsc75xx_reset-> smsc75xx_set_multicast, which leads to use-after-free if the work is scheduled to start after the deallocation. In addition, this patch also removes a dangling pointer - dev->data[0]. This patch calls cancel_work_sync to cancel the scheduled work and set the dangling pointer to NULL.

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::::::::	4.4.271 (including)	4.4.274 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.9.271 (including)	4.9.274 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.14.235 (including)	4.14.238 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.19.193 (including)	4.19.196 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.4.124 (including)	5.4.128 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.10.42 (including)	5.10.46 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.12.9 (including)	5.12.13 (excluding)

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

CVE-2021-47239

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools