CVE-2024-53920

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.)

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://eshelyaron.com/posts/2024-11-27-emacs-aritrary-code-execution-and-how-to-avoid-it.html	Third Party Advisory
https://git.savannah.gnu.org/cgit/emacs.git/tag/?h=emacs-30.0.92	Product
https://git.savannah.gnu.org/cgit/emacs.git/tree/ChangeLog.4	Release Notes
https://git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-30.1	Product
https://news.ycombinator.com/item?id=42256409	Issue Tracking
https://yhetil.org/emacs/CAFXAjY5f4YfHAtZur1RAqH34UbYU56_t6t2Er0YEh1Sb7-W=hg@mail.gmail.com/	Mailing List
https://lists.debian.org/debian-lts-announce/2025/02/msg00033.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:gnu:emacs:*:*:*:*:*:*:*:*

History

03 Nov 2025, 21:17

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2025/02/msg00033.html -

Information

Published : 2024-11-27 15:15

Updated : 2025-11-03 21:17

NVD link : CVE-2024-53920

Mitre link : CVE-2024-53920

CVE.ORG link : CVE-2024-53920

JSON object : View

Products Affected

gnu

emacs

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

{"id": "CVE-2024-53920", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2024-11-27T15:15:26.837", "references": [{"url": "https://eshelyaron.com/posts/2024-11-27-emacs-aritrary-code-execution-and-how-to-avoid-it.html", "tags": ["Third Party Advisory"], "source": "[email protected]"}, {"url": "https://git.savannah.gnu.org/cgit/emacs.git/tag/?h=emacs-30.0.92", "tags": ["Product"], "source": "[email protected]"}, {"url": "https://git.savannah.gnu.org/cgit/emacs.git/tree/ChangeLog.4", "tags": ["Release Notes"], "source": "[email protected]"}, {"url": "https://git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-30.1", "tags": ["Product"], "source": "[email protected]"}, {"url": "https://news.ycombinator.com/item?id=42256409", "tags": ["Issue Tracking"], "source": "[email protected]"}, {"url": "https://yhetil.org/emacs/CAFXAjY5f4YfHAtZur1RAqH34UbYU56_t6t2Er0YEh1Sb7-W=hg@mail.gmail.com/", "tags": ["Mailing List"], "source": "[email protected]"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/02/msg00033.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-94"}]}], "descriptions": [{"lang": "en", "value": "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.)"}, {"lang": "es", "value": "En elisp-mode.el de GNU Emacs hasta la versi\u00f3n 30.0.92, un usuario que elija invocar elisp-completion-at-point (para completar el c\u00f3digo) en c\u00f3digo fuente de Emacs Lisp que no sea de confianza puede desencadenar una expansi\u00f3n de macros de Lisp no segura que permita a los atacantes ejecutar c\u00f3digo arbitrario. (Esta expansi\u00f3n no segura tambi\u00e9n ocurre si un usuario elige habilitar el diagn\u00f3stico sobre la marcha de que byte compila c\u00f3digo fuente de Emacs Lisp que no es de confianza)."}], "lastModified": "2025-11-03T21:17:48.003", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gnu:emacs:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "96EC361D-1CD4-4AE3-AF24-F277BDA1182D", "versionEndExcluding": "30.1"}], "operator": "OR"}]}], "sourceIdentifier": "[email protected]"}