CVE-2023-28327 Null dereference in Linux

What is CVE-2023-28327?

CVE-2023-28327 is a medium-severity vulnerability in Linux kernel, published on 19 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-476

Which versions are affected by CVE-2023-28327?

It affects 2 products.

Products include Linux kernel, Redhat Enterprise Linux.

How do I fix CVE-2023-28327?

Apply the vendor's patch.

Is CVE-2023-28327 being exploited?

There is no known exploitation of CVE-2023-28327 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-26339, DEBIAN-CVE-2023-28327, GHSA-gpc7-6g78-vfxw, UBUNTU-CVE-2023-28327.