CVE-2023-49994 Denial of service in n/a

Medium 5.5 Published 12 Dec 2023 Updated 4 Nov 2025

A floating point exception in espeak-ng allows attackers to cause a denial of service via crafted input.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2023-49994?

CVE-2023-49994 is a medium-severity denial of service vulnerability in n/a, published on 12 Dec 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Espeak-ng 1.52-dev was discovered to contain a Floating Point Exception via the function PeaksToHarmspect at wavegen.c.

Weakness: CWE-697

Which versions are affected by CVE-2023-49994?

It affects 1 product.

Products include Espeak-Ng Espeak-Ng.

How do I fix CVE-2023-49994?

Upgrade to a fixed version.

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-2023-49994 being exploited?

There is no known exploitation of CVE-2023-49994 in the wild and no public exploit code.

Sources

Also known as AZL-34676, CLSA-2026-1788372484, CLSA-2026-1791399419, DEBIAN-CVE-2023-49994, GHSA-2gxf-v2x6-xmcm, UBUNTU-CVE-2023-49994.