CVE-2026-96442 — Emacs: arbitrary code execution in Flymake mode

A code execution flaw was found in Emacs, affecting versions prior to 31.2. Flymake mode using language backends other than Lisp could execute arbitrary code from the edited file during syntax checking. Viewing or editing untrusted files with Emacs could lead to arbitrary code execution with the privileges of the user running Emacs.