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Vulnerability record · CVE-2020-23904 · published 10 November 2021

CVE-2020-23904: Xiph speex out-of-bounds write vulnerability

Xiph · Speex

A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file. NOTE: the vendor states "I cannot reproduce it" and it "is a demo program.

5.5 CVSS 3.1 Medium EPSS 0.72% · top 47.7% CWE-787 · Out-of-bounds write
5.5CVSS 3.1 base score, v2 4.3
0.72%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A stack buffer overflow in speexenc.c of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file. NOTE: the vendor states "I cannot reproduce it" and it "is a demo program.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/xiph/speex/issues/14 ExploitIssue TrackingThird Party Advisory
https://github.com/xiph/speex/issues/14 ExploitIssue TrackingThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-23904), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.