[ GLSA 202608-12 ] Portage: Multiple Vulnerabilities

[email protected] Sat, 15 Aug 2026 18:37:14 -0000
Newsgroups	gmane.linux.gentoo.announce
Message-ID	<178681903494.1.524090288347135498@f5bc8f6d682b>
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Gentoo Linux Security Advisory                           GLSA 202608-12
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                                           https://security.gentoo.org/
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 Severity: High
    Title: Portage: Multiple Vulnerabilities
     Date: August 15, 2026
     Bugs: #978478, #979026
       ID: 202608-12

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Synopsis
========

Multiple vulnerabilities have been found in Portage.

Background
==========

Portage is the default Gentoo package management system.

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

Package           Vulnerable    Unaffected
----------------  ------------  ------------
sys-apps/portage  < 3.0.81.2    >= 3.0.81.2

Description
===========

Multiple vulnerabilities have been discovered in Portage. Please review
the bugs referenced below for details.

The first bug (bug 978478) allows a malicious ebuild (including a build
system it uses indirectly) to write outside of the work directory. While
malicious artifacts could be installed by a package itself, this is
still unexpected if one only ran the configure phrase during
development.

The second bug (bug 979026) is regarding insufficient sandboxing in
global scope. Untrusted ebuilds, even if not emerged, may have the
opportunity to run code in global scope depending on whether the
repository has metadata available. Additional sandboxing has been added.

Impact
======

Please review the referenced bugs for details.

Workaround
==========

Avoid using untrusted repositories or ebuilds, even without installing
them.

Resolution
==========

All Portage users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-apps/portage-3.0.81.2"

In general, we recommend users add external repositories with caution.
If using external repositories, it is good practice to mask all packages
by default from that repository, and unmask only needed packages.

References
==========

[ 1 ] CAN-2026-2033132

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

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

 https://security.gentoo.org/glsa/202608-12

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
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2026 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.

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