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Vulnerability record · CVE-2020-26682 · published 16 October 2020

CVE-2020-26682: Libass project libass integer overflow vulnerability

LLibass Project · Libass

In libass 0.14.0, the `ass_outline_construct`'s call to `outline_stroke` causes a signed integer overflow.

8.8 CVSS 3.1 High EPSS 1.8% · top 22.2% CWE-190 · Integer overflow
8.8CVSS 3.1 base score, v2 6.8
1.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

In libass 0.14.0, the `ass_outline_construct`'s call to `outline_stroke` causes a signed integer overflow.

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

Affected products

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

References

LinkTags
http://www.openwall.com/lists/oss-security/2020/11/19/7 ExploitIssue TrackingMailing ListThird Party Advisory
https://github.com/libass/libass/issues/431 ExploitIssue TrackingThird Party Advisory
https://github.com/libass/libass/pull/432 Issue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202012-12 Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/11/19/7 ExploitIssue TrackingMailing ListThird Party Advisory
https://github.com/libass/libass/issues/431 ExploitIssue TrackingThird Party Advisory
https://github.com/libass/libass/pull/432 Issue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202012-12 Third 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-2020-26682), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.