CVE-2021-47232

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

21/05/2024

Last modified:

04/04/2025

Description

In the Linux kernel, the following vulnerability has been resolved: can: j1939: fix Use-after-Free, hold skb ref while in use This patch fixes a Use-after-Free found by the syzbot. The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS.

Impact

Vector 3.x

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

Base Score: 8.40 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x

8.40

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.4 (including)	5.4.128 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.46 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.12.13 (excluding)
cpe:2.3:o:linux:linux_kernel:5.13:rc1::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc2::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc3::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc4::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc5::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc6::::::

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

CVE-2021-47232

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools