CVE-2023-3390 Use-after-free in Linux kernel's netfilter subsystem

What is CVE-2023-3390?

CVE-2023-3390 is a high-severity use after free vulnerability in Linux kernel, published on 28 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A use-after-free vulnerability was found in the Linux kernel's netfilter subsystem in net/netfilter/nf_tables_api.c.

Mishandled error handling with NFT_MSG_NEWRULE makes it possible to use a dangling pointer in the same transaction causing a use-after-free vulnerability. This flaw allows a local attacker with user access to cause a privilege escalation issue.

We recommend upgrading past commit 1240eb93f0616b21c675416516ff3d74798fdc97

Weakness: CWE-416

Which versions are affected by CVE-2023-3390?

It affects 6 products.

Products include Linux kernel, Netapp H300s, Netapp H410c, Netapp H410s, Netapp H500s, Netapp H700s.

How do I fix CVE-2023-3390?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-3390 being exploited?

There is no known exploitation of CVE-2023-3390 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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-27346, CVE-2023-3117, DEBIAN-CVE-2023-3390, GHSA-vj8j-762w-6jmv, UBUNTU-CVE-2023-3390.