[ GLSA 202608-18 ] Emacs: Arbitrary code execution

[email protected] Thu, 20 Aug 2026 03:00:02 -0000
Newsgroups	gmane.linux.gentoo.announce
Message-ID	<178719480285.1.4271362688084709365@f5bc8f6d682b>
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Gentoo Linux Security Advisory                           GLSA 202608-18
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                                           https://security.gentoo.org/
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 Severity: High
    Title: Emacs: Arbitrary code execution
     Date: August 20, 2026
     Bugs: #980616
       ID: 202608-18

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Synopsis
========

A vulnerability has been discovered in Emacs which could lead to
arbitrary code execution.

Background
==========

Emacs is the extensible, customizable, self-documenting real-time
display editor. org-mode is an Emacs mode for notes and project
planning.

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

Package            Vulnerable     Unaffected
-----------------  -------------  --------------
app-editors/emacs  < 28.2-r21:28  >= 28.2-r21:28
                   < 29.4-r9:29   >= 29.4-r9:29
                   < 30.2-r5:30   >= 30.2-r5:30
                   < 28.2-r21     >= 28.2-r21

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

A vulnerability has been discovered in Emacs. Please review the CVE
identifier referenced below for details.

Impact
======

An attacker could achieve arbitrary code execution by tricking a user
into opening a file with malicious content. No other action by the user
is required.

Workaround
==========

Avoid opening any untrusted files.

Resolution
==========

All Emacs 28 users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-editors/emacs-28.2-r21:28"

All Emacs 29 users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-editors/emacs-29.4-r9:29"

All Emacs 30 users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-editors/emacs-30.2-r5:30"

References
==========


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

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

 https://security.gentoo.org/glsa/202608-18

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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