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(This unsafe expansion also occurs if a user chooses to enable on-the-fly diagnosis that byte compiles untrusted Emacs Lisp source code.)","modified":"2026-05-20T16:19:37.919220901Z","published":"2024-11-27T15:15:00Z","related":["USN-8011-1"],"upstream":["CVE-2024-53920"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-53920"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2024-53920"},{"type":"REPORT","url":"https://eshelyaron.com/posts/2024-11-27-emacs-aritrary-code-execution-and-how-to-avoid-it.html"},{"type":"REPORT","url":"https://git.savannah.gnu.org/cgit/emacs.git/tag/?h=emacs-30.0.92"},{"type":"REPORT","url":"https://git.savannah.gnu.org/cgit/emacs.git/tree/ChangeLog.4"},{"type":"REPORT","url":"https://news.ycombinator.com/item?id=42256409"},{"type":"REPORT","url":"https://yhetil.org/emacs/CAFXAjY5f4YfHAtZur1RAqH34UbYU56_t6t2Er0YEh1Sb7-W=hg%40mail.gmail.com/"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8011-1"}],"affected":[{"package":{"name":"emacs24","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/emacs24?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["24.5+1-1ubuntu2","24.5+1-1ubuntu4","24.5+1-1ubuntu5","24.5+1-1ubuntu6","24.5+1-1ubuntu7","24.5+1-6ubuntu1","24.5+1-6ubuntu1.1","24.5+1-6ubuntu1.1+esm1","24.5+1-6ubuntu1.1+esm2","24.5+1-6ubuntu1.1+esm3","24.5+1-6ubuntu1.1+esm4"],"ecosystem_specific":{"binaries":[{"binary_version":"24.5+1-6ubuntu1.1+esm4","binary_name":"emacs24"},{"binary_version":"24.5+1-6ubuntu1.1+esm4","binary_name":"emacs24-bin-common"},{"binary_name":"emacs24-common","binary_version":"24.5+1-6ubuntu1.1+esm4"},{"binary_version":"24.5+1-6ubuntu1.1+esm4","binary_name":"emacs24-el"},{"binary_name":"emacs24-lucid","binary_version":"24.5+1-6ubuntu1.1+esm4"},{"binary_name":"emacs24-nox","binary_version":"24.5+1-6ubuntu1.1+esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-53920.json"}},{"package":{"name":"xemacs21","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/xemacs21?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["21.4.22-4ubuntu3","21.4.22-14ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"21.4.22-14ubuntu1","binary_name":"xemacs21"},{"binary_version":"21.4.22-14ubuntu1","binary_name":"xemacs21-bin"},{"binary_name":"xemacs21-mule","binary_version":"21.4.22-14ubuntu1"},{"binary_name":"xemacs21-mule-canna-wnn","binary_version":"21.4.22-14ubuntu1"},{"binary_version":"21.4.22-14ubuntu1","binary_name":"xemacs21-nomule"},{"binary_version":"21.4.22-14ubuntu1","binary_name":"xemacs21-support"},{"binary_version":"21.4.22-14ubuntu1","binary_name":"xemacs21-supportel"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-53920.json"}},{"package":{"name":"xemacs21-packages","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/xemacs21-packages?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2009.02.17.dfsg.2-2"],"ecosystem_specific":{"binaries":[{"binary_name":"xemacs21-basesupport","binary_version":"2009.02.17.dfsg.2-2"},{"binary_version":"2009.02.17.dfsg.2-2","binary_name":"xemacs21-basesupport-el"},{"binary_version":"2009.02.17.dfsg.2-2","binary_name":"xemacs21-mulesupport"},{"binary_version":"2009.02.17.dfsg.2-2","binary_name":"xemacs21-mulesupport-el"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-53920.json"}},{"package":{"name":"emacs25","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/emacs25?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["25.2+1-6","25.2+1-6ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"emacs25","binary_version":"25.2+1-6ubuntu0.1~esm2"},{"binary_version":"25.2+1-6ubuntu0.1~esm2","binary_name":"emacs25-bin-common"},{"binary_name":"emacs25-common","binary_version":"25.2+1-6ubuntu0.1~esm2"},{"binary_name":"emacs25-el","binary_version":"25.2+1-6ubuntu0.1~esm2"},{"binary_name":"emacs25-lucid","binary_version":"25.2+1-6ubuntu0.1~esm2"},{"binary_version":"25.2+1-6ubuntu0.1~esm2","binary_name":"emacs25-nox"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-53920.json"}},{"package":{"name":"xemacs21","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/xemacs21?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["21.4.24-4ubuntu1","21.4.24-5ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"xemacs21","binary_version":"21.4.24-5ubuntu1"},{"binary_version":"21.4.24-5ubuntu1","binary_name":"xemacs21-bin"},{"binary_version":"21.4.24-5ubuntu1","binary_name":"xemacs21-mule"},{"binary_name":"xemacs21-mule-canna-wnn","binary_version":"21.4.24-5ubuntu1"},{"binary_name":"xemacs21-nomule","bin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