CVE-2020-15889

lua: heap-based buffer over-read in lgc.c

Published 21 Jul 2020Modified 17 Jun 2026CWE 125

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Red Hat8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Bitnami9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, Bitnami, CBL-Mariner. Rated lower by Red Hat (high).

Description

Lua 5.4.0 has a getobjname heap-based buffer over-read because youngcollection in lgc.c uses markold for an insufficient number of list members.

Affected packages and fixed versions

Source	Package	Fixed in
bitnami::Bitnami Vulnerability Database	lua	5.4.1
CBL-Mariner 1.0	lua	0:5.3.5-7.cm1
conan::GitLab Advisory Database Community	lua	5.4.1
debian 11	lua5.4	5.4.0-2
debian 12	lua5.4	5.4.0-2
debian 13	lua5.4	5.4.0-2
debian 14	lua5.4	5.4.0-2
echo	lua5.4	5.4.0-2

References

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Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.