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[USN-8262-1] Lua vulnerability

Posted on 08 May 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8262-1
May 08, 2026

lua5.1 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Lua could be made to crash or run programs as your login if it
opened a specially crafted file.

Software Description:
- lua5.1: Lua is an embeddable scripting language

Details:

It was discovered that the Lua parser incorrectly handled garbage collection
when processing specially crafted Lua scripts. A remote attacker could possibly
use this issue to cause a denial of service or execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS
liblua5.1-0 5.1.5-8ubuntu1+esm1
Available with Ubuntu Pro
lua5.1 5.1.5-8ubuntu1+esm1
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8262-1
CVE-2025-49844

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