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

> A local attacker can exploit a use-after-free in the netfilter subsystem to escalate privileges on Linux systems.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 28 Jun 2023
- **Updated:** 22 Jul 2026
- **Also known as:** AZL-27346, CVE-2023-3117, DEBIAN-CVE-2023-3390, GHSA-vj8j-762w-6jmv, UBUNTU-CVE-2023-3390

## 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 (Use After Free)

## Which versions are affected by CVE-2023-3390?

It affects 6 products.


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

## How do I fix CVE-2023-3390?

Apply the vendor's patch.

## 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:

- PoC of the CVE-2023-3390 (github_poc): https://github.com/flygonty/CVE-2023-3390_PoC

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-3390 and fix it if it is affected.

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

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-3390/ (Markdown: https://insights.sbomify.com/CVE-2023-3390/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3390
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3390
- OSV: https://osv.dev/vulnerability/CVE-2023-3390

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-3390/
Summaries are generated and may contain mistakes; the official description above is the record.