CVE-2023-2166 Null dereference in Linux

What is CVE-2023-2166?

CVE-2023-2166 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 issue was found in can protocol in net/can/af_can.c in the Linux before Linux. ml_priv may not be initialized in the receive path of CAN frames. A local user could use this flaw to crash the system or potentially cause a denial of service.

Weakness: CWE-476

Which versions are affected by CVE-2023-2166?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-2166?

Apply the vendor's patch.

Is CVE-2023-2166 being exploited?

There is no known exploitation of CVE-2023-2166 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-26340, DEBIAN-CVE-2023-2166, GHSA-f7h3-2rcm-qw98, UBUNTU-CVE-2023-2166.