[USN-7678-1] Perl vulnerability

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Ubuntu Security Notice USN-7678-1
July 29, 2025

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

- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Perl could be made to target unintended paths when performing file
operations.

Software Description:
- perl: Practical Extraction and Report Language

Details:

It was discovered that Perl threads incorrectly handled certain file
operations. A local attacker could possibly use this issue to load code or
access files from unexpected locations.

Update instructions:

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

Ubuntu 25.04
perl 5.40.1-2ubuntu0.2

Ubuntu 24.04 LTS
perl 5.38.2-3.2ubuntu0.2

Ubuntu 22.04 LTS
perl 5.34.0-3ubuntu1.5

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

References:
https://ubuntu.com/security/notices/USN-7678-1
CVE-2025-40909

Package Information:
https://launchpad.net/ubuntu/+source/perl/5.40.1-2ubuntu0.2
https://launchpad.net/ubuntu/+source/perl/5.38.2-3.2ubuntu0.2
https://launchpad.net/ubuntu/+source/perl/5.34.0-3ubuntu1.5