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Vulnerability record · CVE-2018-20001 · published 10 December 2018

CVE-2018-20001: Libav improper input validation vulnerability

Libav · Libav

In Libav 12.3, there is a floating point exception in the range_decode_culshift function (called from range_decode_bits) in libavcodec/apedec.c that will lead to remote denial of service via crafted input.

6.5 CVSS 3.0 Medium EPSS 1.0% · top 38.3% CWE-20 · Improper input validation
6.5CVSS 3.0 base score, v2 4.3
1.0%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

In Libav 12.3, there is a floating point exception in the range_decode_culshift function (called from range_decode_bits) in libavcodec/apedec.c that will lead to remote denial of service via crafted input.

CVSS:3.0/AV:N/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://bugzilla.libav.org/show_bug.cgi?id=1141 ExploitIssue TrackingThird Party Advisory
https://bugzilla.libav.org/show_bug.cgi?id=1141 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-2018-20001), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.