CVE-2023-3022 Null dereference in Linux Kernel (IPv6)

What is CVE-2023-3022?

CVE-2023-3022 is a medium-severity vulnerability in Linux kernel, published on 19 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A flaw was found in the IPv6 module of the Linux kernel. The arg.result was not used consistently in fib6_rule_lookup, sometimes holding rt6_info and other times fib6_info. This was not accounted for in other parts of the code where rt6_info was expected unconditionally, potentially leading to a kernel panic in fib6_rule_suppress.

Weakness: CWE-843

Which versions are affected by CVE-2023-3022?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-3022?

Apply the vendor's patch.

Is CVE-2023-3022 being exploited?

There is no known exploitation of CVE-2023-3022 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 DEBIAN-CVE-2023-3022, GHSA-f6mp-2jrx-cmh3, UBUNTU-CVE-2023-3022.