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[USN-8011-1] Emacs vulnerabilities

Posted on 04 February 2026
Ubuntu Security

==========================================================================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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