CVE-2019-14834

Severity: low (CVSS 3.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-01-07 · updated 2026-06-17
Weakness: CWE-770

Description

A vulnerability was found in dnsmasq before version 2.81, where the memory leak allows remote attackers to cause a denial of service (memory consumption) via vectors involving DHCP response creation.

Affected products

Fedoraproject Fedora: 31
Simon Kelley dnsmasq: before 2.81 — fixed in 2.81

How to fix

Upgrade to a fixed version: Simon Kelley dnsmasq 2.81. Check the vendor advisory for mitigations.

References

http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=69bc94779c2f035a9fffdb5327a54c3aeca73ed5
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14834
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JU474LT66BHNVFG5C4GEV3VTZNAEJ3BS/
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=69bc94779c2f035a9fffdb5327a54c3aeca73ed5
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14834
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JU474LT66BHNVFG5C4GEV3VTZNAEJ3BS/

Get alerted when CVE-2019-14834 or the next vulnerability affects your stack