CVE-2020-15889

Public Exploit

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.52%
Third-Party Advisory lua-users.org Third-Party Advisory lua-users.org Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lua-users.org/lists/lua-l/2020-07/msg00078.html mailing list third party advisory exploit
https://github.com/lua/lua/commit/127e7a6c8942b362aa3c6627f44d660a4fb75312 third party advisory patch
http://lua-users.org/lists/lua-l/2020-12/msg00157.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2020-15889?
CVE-2020-15889 has been scored as a critical severity vulnerability.
How to fix CVE-2020-15889?
To fix CVE-2020-15889, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-15889 being actively exploited in the wild?
It is possible that CVE-2020-15889 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.