CVE-2019-11366: Atftp Project Atftp

Medium severity, CVSS 5.9. EPSS: 2.1% chance of exploitation in the next 30 days.

An issue was discovered in atftpd in atftp 0.7.1. It does not lock the thread_list_mutex mutex before assigning the current thread data structure. As a result, the daemon is vulnerable to a denial of service attack due to a NULL pointer dereference. If thread_data is NULL when assigned to current, and modified by another thread before a certain tftpd_list.c check, there is a crash when dereferencing current->next.

Affected products

Published 2019-04-20. Last modified 2026-06-17.