CVE-2023-53220

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

15/09/2025

Last modified:

14/01/2026

Description

In the Linux kernel, the following vulnerability has been resolved: media: az6007: Fix null-ptr-deref in az6007_i2c_xfer() In az6007_i2c_xfer, msg is controlled by user. When msg[i].buf is null and msg[i].len is zero, former checks on msg[i].buf would be passed. Malicious data finally reach az6007_i2c_xfer. If accessing msg[i].buf[0] without sanity check, null ptr deref would happen. We add check on msg[i].len to prevent crash. Similar commit: commit 0ed554fd769a ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()")

Impact

Vector 3.x

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

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		4.14.326 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.15 (including)	4.19.295 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.257 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.197 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.133 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.55 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.5.5 (excluding)

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

CVE-2023-53220

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools