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[USN-9073-1] Lhasa vulnerability

Posted on 13 November 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-9073-1
November 12, 2026

lhasa vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

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

Software Description:
- lhasa: lzh archive decompressor

Details:

It was discovered that Lhasa incorrectly handled certain LHA archive
headers, leading to an integer underflow. If a user or automated system
were tricked into opening a specially crafted archive, an attacker could
possibly use this issue to cause Lhasa to crash or execute arbitrary code.

Update instructions:

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

Ubuntu 16.04 LTS
lhasa 0.3.0-2ubuntu0.1~esm1
Available with Ubuntu Pro
liblhasa0 0.3.0-2ubuntu0.1~esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-9073-1
CVE-2016-2347

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