Ubuntu alert USN-8011-1 (emacs)

From:
             
 
noreply+usn-bot@canonical.com
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-8011-1] Emacs vulnerabilities
Date:
             
 
Wed, 04 Feb 2026 13:50:00 +0000
Message-ID:
             
 
<E1vndGa-0006IL-Ph@lists.ubuntu.com>
==========================================================================
Ubuntu Security Notice USN-8011-1
February 04, 2026

emacs vulnerabilities
==========================================================================

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

- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in Emacs.

Software Description:
- emacs: An extensible, customizable, free/libre text editor — and more.

Details:

It was discovered that Emacs could trigger unsafe Lisp macro expansion,
when a user invoked elisp-completion-at-point on untrusted Emacs Lisp 
source code. An attacker could possibly use this issue to execute 
arbitrary code. (CVE-2024-53920)

It was discovered that Emacs did not properly sanitize input when 
handling certain URI schemes. An attacker could possibly use this issue
to execute arbitrary shell commands by tricking a user into opening a 
specially crafted URL. (CVE-2025-1244)

Update instructions:

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

Ubuntu 24.04 LTS
  emacs                           1:29.3+1-1ubuntu2+esm3
                                  Available with Ubuntu Pro
  emacs-bin-common                1:29.3+1-1ubuntu2+esm3
                                  Available with Ubuntu Pro
  emacs-common                    1:29.3+1-1ubuntu2+esm3
                                  Available with Ubuntu Pro
  emacs-el                        1:29.3+1-1ubuntu2+esm3
                                  Available with Ubuntu Pro
  emacs-gtk                       1:29.3+1-1ubuntu2+esm3
                                  Available with Ubuntu Pro
  emacs-lucid                     1:29.3+1-1ubuntu2+esm3
                                  Available with Ubuntu Pro
  emacs-nox                       1:29.3+1-1ubuntu2+esm3
                                  Available with Ubuntu Pro
  emacs-pgtk                      1:29.3+1-1ubuntu2+esm3
                                  Available with Ubuntu Pro

Ubuntu 22.04 LTS
  emacs                           1:27.1+1-3ubuntu5.2+esm1
                                  Available with Ubuntu Pro
  emacs-bin-common                1:27.1+1-3ubuntu5.2+esm1
                                  Available with Ubuntu Pro
  emacs-common                    1:27.1+1-3ubuntu5.2+esm1
                                  Available with Ubuntu Pro
  emacs-el                        1:27.1+1-3ubuntu5.2+esm1
                                  Available with Ubuntu Pro
  emacs-gtk                       1:27.1+1-3ubuntu5.2+esm1
                                  Available with Ubuntu Pro
  emacs-lucid                     1:27.1+1-3ubuntu5.2+esm1
                                  Available with Ubuntu Pro
  emacs-nox                       1:27.1+1-3ubuntu5.2+esm1
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  emacs                           1:26.3+1-1ubuntu2+esm2
                                  Available with Ubuntu Pro
  emacs-bin-common                1:26.3+1-1ubuntu2+esm2
                                  Available with Ubuntu Pro
  emacs-common                    1:26.3+1-1ubuntu2+esm2
                                  Available with Ubuntu Pro
  emacs-el                        1:26.3+1-1ubuntu2+esm2
                                  Available with Ubuntu Pro
  emacs-gtk                       1:26.3+1-1ubuntu2+esm2
                                  Available with Ubuntu Pro
  emacs-lucid                     1:26.3+1-1ubuntu2+esm2
                                  Available with Ubuntu Pro
  emacs-nox                       1:26.3+1-1ubuntu2+esm2
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-8011-1
  CVE-2024-53920, CVE-2025-1244


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