CVE-2020-23903

MEDIUMNVD 5.55.5—

5.5

A Divide by Zero vulnerability in the function static int read_samples of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 26.9%
KEV: Not listed

Published

November 10, 2021

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://github.com/xiph/speex/issues/13
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LXCRAYNW5ESCE2PIGTUXZNZHNYFLJ6PX/
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R3SEV2ZRR47GSD3M7O5PH4XEJMKJJNG2/
af854a3a-2127-422b-91ae-364da2661108https://github.com/xiph/speex/issues/13
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LXCRAYNW5ESCE2PIGTUXZNZHNYFLJ6PX/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R3SEV2ZRR47GSD3M7O5PH4XEJMKJJNG2/

Patch Availability(2)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libspeex1 (1.2~rc1.2-1ubuntu1+esm1) @ xenial	2026-05-26	ubuntu
redhat	speex-0:1.2.0-11.el9	2022-11-15	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-369Divide By Zero

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:41 UTCEG score recompute
2026-05-26 07:41 UTCVendor advisory
2026-05-26 07:41 UTCGHSA enrichment
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:48 UTCepss_batch

Frequently asked(5)

What is CVE-2020-23903?

CVE-2020-23903 is a medium vulnerability published on November 10, 2021. A Divide by Zero vulnerability in the function static int read_samples of Speex v1.2 allows attackers to cause a denial of service (DoS) via a crafted WAV file.

When was CVE-2020-23903 disclosed?

CVE-2020-23903 was first published in the National Vulnerability Database on November 10, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-23903 actively exploited?

CVE-2020-23903 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-23903?

CVE-2020-23903 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2020-23903?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-23903, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-23903

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