What is CVE-2023-28328?

CVE-2023-28328 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from Linux Kernel prior to kernel 6.2 RC1 onward and patched in 6.2. CVE-2023-28328 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-28328?

CVE-2023-28328 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-28328?

Yes, CVE-2023-28328 has been patched. Fixed versions include 6.2. If you are running Linux kernel Linux Kernel prior to kernel 6.2 RC1 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-28328 actively exploited?

CVE-2023-28328 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2023-28328

Medium

A NULL pointer dereference flaw was found in the az6027 driver in drivers/media/usb/dev-usb/az6027.c in the Linux Kernel. The message from user space is not checked properly before transferring into the device. This flaw allows a local user to crash the system or potentially cause a denial of service.

Package Linux Kernel

Published 2023-04-19

Last modified 2025-03-19

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-476

CVE-2023-28328 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions Linux Kernel prior to kernel 6.2 RC1 and later are affected. Fixed in 6.2 and their respective stable series.

Affected from

≥ Linux Kernel prior to kernel 6.2 RC1

Fixed in

✓ 6.2 6.2.x

References

3 total

Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2177389

Issue Tracking Patch
Debian Security
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
Debian Security
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html

Details

CVE ID CVE-2023-28328

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2023-04-19

Modified 2025-03-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-28328?

CVE-2023-28328 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from Linux Kernel prior to kernel 6.2 RC1 onward and has been patched in 6.2. CVE-2023-28328 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-28328?

CVE-2023-28328 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-28328?

Yes. CVE-2023-28328 has been patched. Fixed versions include 6.2. If you are running Linux kernel Linux Kernel prior to kernel 6.2 RC1 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-28328 actively exploited?

No. CVE-2023-28328 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.