A new security update has been released for Gentoo Linux - Samba: Execution of arbitrary code. Here the announcement:

Gentoo Linux Security Advisory [UPDATE] GLSA 200711-29:02
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http://security.gentoo.org/
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Severity: High
Title: Samba: Execution of arbitrary code
Date: November 20, 2007
Updated: December 05, 2007
Bugs: #197519
ID: 200711-29:02

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Update
======

The original GLSA only resolved one of the two vulnerabilities due to a
regression. New packages are available that resolve both buffer
overflows.

The updated sections appear below.

Synopsis
========

Samba contains two buffer overflow vulnerabilities potentially
resulting in the execution of arbitrary code.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-fs/samba < 3.0.27a >= 3.0.27a

Resolution
==========

All Samba users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-fs/samba-3.0.27a"

The first vulnerability (CVE-2007-5398) was already fixed in
Samba 3.0.26a-r2.

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200711-29.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5