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CVE-2023-49991

MEDIUM
5.3
CVSS Score
Published: December 12, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 06:36 AM UTC
1 product affected across 1 vendorEspeak Ng

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

Espeak-ng 1.52-dev was discovered to contain a Stack Buffer Underflow via the function CountVowelPosition at synthdata.c.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

References (6)

ExploitIssue TrackingVendor Advisory
Source: [email protected]
https://github.com/espeak-ng/espeak-ng/issues/1825
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2PZEBWPNKPAYJMIM3AS2RP3FL6FX3HS4/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z5WW6RKHRWLEMCKCQ6UZCXWC5J7UWMUQ/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/05/msg00050.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/[email protected]/message/2PZEBWPNKPAYJMIM3AS2RP3FL6FX3HS4/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/[email protected]/message/Z5WW6RKHRWLEMCKCQ6UZCXWC5J7UWMUQ/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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