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CVE-2023-49991
Espeak-ng 1.52-dev was discovered to contain a Stack Buffer Underflow via the function CountVowelPosition at synthdata.c.
Medium5.3EPSS 0.37%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Espeak-ng 1.52-dev was discovered to contain a Stack Buffer Underflow via the function CountVowelPosition at synthdata.c.
Timeline
ID reserved
By mitre
- 8 days later
· 8 days later
Published
- 23 months later
· 23 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
- EPSS (exploitation in 30 days)
- 0.37% · top 69% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
n/a
- affected n/a
References (6)
- https://github.com/espeak-ng/espeak-ng/issues/1825 (opens in a new tab)x_transferred
- FEDORA-2024-5661c87b25 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2024-698737a3c5 (opens in a new tab)vendor-advisoryx_transferred
- https://lists.debian.org/debian-lts-announce/2025/05/msg00050.html (opens in a new tab)
- https://lists.fedoraproject.org/archives/list/[email protected]/message/2PZEBWPNKPAYJMIM3AS2RP3FL6FX3HS4/ (opens in a new tab)
- https://lists.fedoraproject.org/archives/list/[email protected]/message/Z5WW6RKHRWLEMCKCQ6UZCXWC5J7UWMUQ/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-49991)Record last updated .