CVE-2018-14403

CRITICALNVD 9.89.8—Trending — 3 sources updated this week

9.8

MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to use of an inappropriate data type for associated atoms. The resulting type confusion can cause out-of-bounds memory access.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 63.8%
KEV: Not listed

Published

July 19, 2018

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated May 28, 2026

Patch available. Sources: github_release.

generic

[SECURITY] Fedora 29 Update: libmp4v2-2.1.0-0.19.trunkREV507.fc29 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GISUIWPKBWPXORUFNWBGFTKQS7UUVUC4/

generic

[SECURITY] Fedora 30 Update: libmp4v2-2.1.0-0.19.trunkREV507.fc30 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRSO2IMK6P7MOIZWGWKONPIEHKBA7WL3/

generic

[SECURITY] Fedora 31 Update: libmp4v2-2.1.0-0.19.trunkREV507.fc31 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6YCHVOYPIBGM5HYUMQ77KZH2IHSITKVE/

github_release Patch Available

MP4v2 v2.1.0

Patch available: enzo1982/mp4v2 v2.1.0

https://github.com/enzo1982/mp4v2/releases/tag/v2.1.0

generic

oss-security - Out-of-bounds memory access in MP4v2 2.0.0

http://www.openwall.com/lists/oss-security/2018/07/18/3

Weakness Classification(1)

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

CWE-704Incorrect Type Conversion or Cast

Data Freshness Timeline

(refreshed 13× in last 7d / 14× 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.

2026-05-31 22:29 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 04:56 UTCEG score recompute
2026-05-28 04:56 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-25 00:13 UTCOSV refresh

Frequently asked(5)

What is CVE-2018-14403?

CVE-2018-14403 is a critical vulnerability published on July 19, 2018. MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to use of an inappropriate data type for associated atoms. The resulting type confusion can cause out-of-bounds memory access.

When was CVE-2018-14403 disclosed?

CVE-2018-14403 was first published in the National Vulnerability Database on July 19, 2018, 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-2018-14403 actively exploited?

CVE-2018-14403 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 63.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-14403?

CVE-2018-14403 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2018-14403?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-14403, 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-2018-14403

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CVE-2018-14403

📅 Published

🔄 Last Modified

📋 Advisory Details (5)

[SECURITY] Fedora 29 Update: libmp4v2-2.1.0-0.19.trunkREV507.fc29 - package-announce - Fedora mailing-lists

[SECURITY] Fedora 30 Update: libmp4v2-2.1.0-0.19.trunkREV507.fc30 - package-announce - Fedora mailing-lists

[SECURITY] Fedora 31 Update: libmp4v2-2.1.0-0.19.trunkREV507.fc31 - package-announce - Fedora mailing-lists

MP4v2 v2.1.0

oss-security - Out-of-bounds memory access in MP4v2 2.0.0

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-14403?

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Published

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Advisory Details (5)

Frequently asked(5)

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