# CVE-2026-7164: pf can overflow the stack parsing crafted SCTP packets

> Remote attackers can cause a system panic via crafted SCTP packets due to stack overflow in pf, affecting FreeBSD systems.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Apr 2026
- **Updated:** 30 Apr 2026
- **Also known as:** GHSA-7vxr-7vxq-j68j

## What is CVE-2026-7164?

CVE-2026-7164 is a high-severity denial of service vulnerability in Freebsd Freebsd, published on 30 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Incorrect packet validation allowed unbounded recursion parsing SCTP chunk parameters.  This can eventually result in a stack overflow and panic.

Remote attackers can craft packets which cause affected systems to panic.  This affects any system where pf is configured to process traffic, independent of the configured ruleset.

Weakness: CWE-791 (Incomplete Filtering of Special Elements), CWE-674 (Uncontrolled Recursion)

## Which versions are affected by CVE-2026-7164?

It affects 1 product.


Products: Freebsd Freebsd.

## How do I fix CVE-2026-7164?

No fix has been published for CVE-2026-7164 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-7164 being exploited?

There is no known exploitation of CVE-2026-7164 in the wild and no public exploit code.

## Other vulnerabilities in Freebsd Freebsd

- [CVE-2018-17160](https://insights.sbomify.com/CVE-2018-17160/): Memory corruption in FreeBSD (critical 10.0)
- [CVE-2014-3954](https://insights.sbomify.com/CVE-2014-3954/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-4304](https://insights.sbomify.com/CVE-2006-4304/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-0226](https://insights.sbomify.com/CVE-2006-0226/): Integer overflow in n/a (critical 10.0)
- [CVE-2004-0002](https://insights.sbomify.com/CVE-2004-0002/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7164 and fix it if it is affected.

What it is: CVE-2026-7164 is a high-severity denial of service vulnerability in Freebsd Freebsd, published on 30 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-7164 in the wild and no public exploit code.

Affected product: Freebsd Freebsd. 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-2026-7164/ (Markdown: https://insights.sbomify.com/CVE-2026-7164/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7164
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7164
- OSV: https://osv.dev/vulnerability/CVE-2026-7164

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-7164/
Summaries are generated and may contain mistakes; the official description above is the record.