What is CVE-2023-28327?

CVE-2023-28327 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 onward. CVE-2023-28327 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-28327?

CVE-2023-28327 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-2023-28327?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-28327 patch availability.

Is CVE-2023-28327 actively exploited?

CVE-2023-28327 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-2023-28327

Medium

A NULL pointer dereference flaw was found in the UNIX protocol in net/unix/diag.c In unix_diag_get_exact in the Linux Kernel. The newly allocated skb does not have sk, leading to a NULL pointer. This flaw allows a local user to crash 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

Not yet patched

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-2023-28327 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 and later are affected. No fixed version recorded yet.

Affected from

≥ Linux

References

1 total

Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2177382

Issue Tracking Patch

Details

CVE ID CVE-2023-28327

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2023-04-19

Modified 2025-03-19

KEV No

Patch

Not yet patched

Package linux

Frequently asked questions

What is CVE-2023-28327?

CVE-2023-28327 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 onward . CVE-2023-28327 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-28327?

CVE-2023-28327 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-2023-28327?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-28327 patch availability.
Is CVE-2023-28327 actively exploited?

No. CVE-2023-28327 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.