CVE-2023-49991
espeak-ng: buffer underflow in CountVowelPosition function at synthdata.c
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 12, 2023
Updated · November 21, 2025
Description
A flaw was found in the espeak-ng package. A local attacker can use a specially crafted payload to trigger a buffer underflow condition, which may lead to an application crash or allow for arbitrary code execution.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 5.3CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CWE-124 · Buffer Underwrite ('Buffer Underflow')