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

High 7.5 Published 30 Apr 2026 Updated 30 Apr 2026

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

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

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, CWE-674

Which versions are affected by CVE-2026-7164?

It affects 1 product.

Products include 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.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-7164 being exploited?

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

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-7vxr-7vxq-j68j.