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A lua5.3 security update has been released for Debian GNU/Linux 10 LTS to address issues that may result in denial of service.

[SECURITY] [DLA 3469-1] lua5.3 security update

Debian LTS Advisory DLA-3469-1 Guilhem Moulin
June 23, 2023

Package : lua5.3
Version : 5.3.3-1.1+deb10u1
CVE ID : CVE-2019-6706 CVE-2020-24370
Debian Bug : 920321 988734

Issues were found in lua5.3, a powerful, light-weight programming
language designed for extending applications, which may result in denial
of service.


Fady Osman discovered a heap-user-after-free vulnerability in
lua_upvaluejoin() in lapi.c, which might result in denial of service
upon calling debug.upvaluejoin() with specific arguments.


Yongheng Chen discovered a negation overflow and segmentation fault
issue in getlocal() and setlocal(), as demonstrated by getlocal(3,2^31).

For Debian 10 buster, these problems have been fixed in version

We recommend that you upgrade your lua5.3 packages.

For the detailed security status of lua5.3 please refer to
its security tracker page at:

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: