CVE-2018-16451 Memory corruption in n/a

Critical 9.8 Published 3 Oct 2019 Updated 3 Dec 2025

A buffer over-read in tcpdump's SMB parser allows attackers to cause denial of service or disclose sensitive memory contents via crafted packets.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-16451?

CVE-2018-16451 is a critical memory corruption vulnerability in Apple Mac Os X, published on 3 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The SMB parser in tcpdump before 4.9.3 has buffer over-reads in print-smb.c:print_trans() for \MAILSLOT\BROWSE and \PIPE\LANMAN.

Weakness: CWE-125

Which versions are affected by CVE-2018-16451?

It affects 6 products.

Products include Apple Mac Os X, Debian Debian Linux, Fedoraproject Fedora, Opensuse Leap, Redhat Enterprise Linux, Tcpdump Tcpdump.

How do I fix CVE-2018-16451?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-16451 being exploited?

There is no known exploitation of CVE-2018-16451 in the wild and no public exploit code.

All Apple Mac Os X vulnerabilities

Sources

Also known as ALPINE-CVE-2018-16451, DEBIAN-CVE-2018-16451, GHSA-q5wq-8g35-qxj4, UBUNTU-CVE-2018-16451.