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[USN-8940-1] Perl XS::Parse::Keyword module vulnerability

Posted on 21 October 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8940-1
October 20, 2026

libxs-parse-keyword-perl vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.10
- Ubuntu 26.04 LTS

Summary:

The Perl XS::Parse::Keyword module could be made to crash if it received
specially crafted input.

Software Description:
- libxs-parse-keyword-perl: XS functions to assist in parsing keyword syntax

Details:

It was discovered that the Perl XS::Parse::Keyword module did not
correctly handle certain inputs. If a user or automated system were
tricked into receiving specially crafted input, an attacker could cause
a denial of service.

Update instructions:

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

Ubuntu 26.10
libxs-parse-keyword-perl 0.49-1ubuntu1

Ubuntu 26.04 LTS
libxs-parse-keyword-perl 0.49-1ubuntu0.1

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

References:
https://ubuntu.com/security/notices/USN-8940-1
CVE-2026-85644

Package Information:
https://launchpad.net/ubuntu/+source/libxs-parse-keyword-perl/0.49-1ubuntu1
https://launchpad.net/ubuntu/+source/libxs-parse-keyword-perl/0.49-1ubuntu0.1

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