Description
In elisp-mode.el in GNU Emacs before 30.1, a user who chooses to invoke elisp-completion-at-point (for code completion) on untrusted Emacs Lisp source code can trigger unsafe Lisp macro expansion that allows attackers to execute arbitrary code. (This unsafe expansion also occurs if a user chooses to enable on-the-fly diagnosis that byte compiles untrusted Emacs Lisp source code.)
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | emacs | 1:30.1+1-1 | — |
| Debian 13 | emacs | 1:30.1+1-1 | — |
| Debian 12 | emacs | 1:28.2+1-15+deb12u4 | DSA-5871-1 |
| Debian 11 | emacs | 1:27.1+1-3.1+deb11u6 | DLA-4069-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | xemacs21 +1 | No fix yet | — |
| Ubuntu 26.04 LTS | xemacs21 +1 | No fix yet | — |
| Ubuntu 25.10 | xemacs21 +1 | No fix yet | — |
| Ubuntu 24.04 LTS | xemacs21 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | xemacs21 +1 | No fix yet | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | xemacs21 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | xemacs21 +1 | No fix yet | — |
| Ubuntu 16.04 LTS | xemacs21 +1 | No fix yet | — |
| Ubuntu Pro 24.04 LTS | emacs | 1:29.3+1-1ubuntu2+esm3 | USN-8011-1 |
| Ubuntu Pro 22.04 LTS | emacs | 1:27.1+1-3ubuntu5.2+esm1 | USN-8011-1 |
| Ubuntu Pro 20.04 LTS | emacs | 1:26.3+1-1ubuntu2+esm2 | USN-8011-1 |
| Ubuntu Pro 18.04 LTS | emacs25 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | emacs24 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | emacs +4 | 1:29.4-13.el10_2 | RHBA-2026:22541 |
| RHEL 9 | emacs +4 | 1:27.2-11.el9_5.2 | RHSA-2025:9448, RHSA-2025:4787 |
| RHEL 8 | emacs +5 | 1:26.1-15.el8_10 | RHSA-2025:11030 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | emacs +4 | 1:27.2-10.el9_4.2 | RHSA-2025:4793 |
| RHEL 9.2 EUS | emacs +4 | 1:27.2-8.el9_2.3 | RHSA-2025:4794 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | emacs +4 | 1:27.2-11.el9_5.2 | ALSA-2025:9448, ALSA-2025:4787 |
| AlmaLinux 8 | emacs +4 | 1:26.1-15.el8_10 | ALSA-2025:11030 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | emacs | 1:27.2-11.el9_5.2 | RLSA-2025:9448, RLSA-2025:4787 |
| Rocky Linux 8 | emacs | 1:26.1-15.el8_10 | RLSA-2025:11030 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | emacs | 27.2-150400.3.20.2 | SUSE-SU-2025:0798-1, SUSE-SU-2024:4392-1 |
| SLES 15 SP5 | emacs | 27.2-150400.3.20.2 | SUSE-SU-2025:0798-1, SUSE-SU-2024:4392-1 |
| SLES 15 SP4 | emacs | 27.2-150400.3.20.2 | SUSE-SU-2025:0798-1, SUSE-SU-2024:4392-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | emacs | 27.2-150400.3.26.1 | SUSE-SU-2025:0798-1 |
| SLES for SAP 15 SP4 | emacs | 27.2-150400.3.20.2 | SUSE-SU-2025:0798-1, SUSE-SU-2024:4392-1 |
| SLE HPC 15 SP5 | emacs | 27.2-150400.3.26.1 | SUSE-SU-2025:0798-1 |
| SLE HPC 15 SP4 | emacs | 27.2-150400.3.20.2 | SUSE-SU-2025:0798-1, SUSE-SU-2024:4392-1 |
| SUSE Manager Server 4.3 | emacs | 27.2-150400.3.20.2 | SUSE-SU-2025:0798-1, SUSE-SU-2024:4392-1 |
| SUSE Manager Proxy 4.3 | emacs | 27.2-150400.3.20.2 | SUSE-SU-2025:0798-1, SUSE-SU-2024:4392-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | emacs | 29.4-11.1 | openSUSE-SU-2024:14591-1 |
| openSUSE Leap 15.6 | emacs | 27.2-150400.3.20.2 | SUSE-SU-2025:0798-1, SUSE-SU-2024:4392-1 |
| openSUSE Leap 15.5 | emacs | 27.2-150400.3.20.2 | SUSE-SU-2024:4392-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | emacs +6 | 1:28.2-3.amzn2023.0.9 | ALAS2023-2025-849 |
| Amazon Linux 2 | emacs +6 | 1:27.2-4.amzn2.0.6 | ALAS2-2025-2757 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | emacs | 29.4-3 | — |
| Azure Linux 2 (CBL-Mariner) | emacs | 29.4-3 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | emacs +4 | 1:27.2-11.el9_5.2 | ELSA-2025-9448, ELSA-2025-4787 |
| Oracle Linux 8 | emacs +5 | 1:26.1-15.el8_10 | ELSA-2025-11030 |
Advisories 25
- RHBA-2026:22541 Red Hat Bug Fix Advisory: emacs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- WID-SEC-2024-3558 GNU Emacs und Red Hat Enterprise Linux: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Nov 11, 2026
- ALSA-2025:9448 Moderate: emacs security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:4787 Moderate: emacs security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:11030 Moderate: emacs security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:9448 Red Hat Security Advisory: emacs security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2025:4793 Red Hat Security Advisory: emacs security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2025:4794 Red Hat Security Advisory: emacs security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2025:4787 Red Hat Security Advisory: emacs security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2025:11030 Red Hat Security Advisory: emacs security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- USN-8011-1 emacs vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5871-1 emacs - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4069-1 emacs - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2025-1905 IBM QRadar SIEM Komponente: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 4, 2026
- SUSE-SU-2025:0798-1 Security update for emacs SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4392-1 Security update for emacs SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14591-1 emacs-29.4-11.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RLSA-2025:9448 Moderate: emacs security update Rocky Linux Security Advisories · Oct 4, 2025
- RLSA-2025:4787 Moderate: emacs security update Rocky Linux Security Advisories · Jul 29, 2025
- RLSA-2025:11030 Moderate: emacs security update Rocky Linux Security Advisories · Jul 29, 2025
- ELSA-2025-11030 Moderate: emacs security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 15, 2025
- ELSA-2025-9448 Moderate: emacs security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 24, 2025
- ELSA-2025-4787 Moderate: emacs security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 12, 2025
- ALAS2-2025-2757 Important: emacs security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 25, 2025
- ALAS2023-2025-849 Important: emacs security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 21, 2025
References
- https://git.savannah.gnu.org/cgit/emacs.git/tree/ChangeLog.4
- https://git.savannah.gnu.org/cgit/emacs.git/tag/?h=emacs-30.0.92
- https://eshelyaron.com/posts/2024-11-27-emacs-aritrary-code-execution-and-how-to-avoid-it.html
- https://yhetil.org/emacs/CAFXAjY5f4YfHAtZur1RAqH34UbYU56_t6t2Er0YEh1Sb7-W=hg@mail.gmail.com/
- https://news.ycombinator.com/item?id=42256409
- https://git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-30.1