Amazon Linux 2027 Preview Security Advisory: ALAS2027-2026-097
Advisory Release Date: 2026-09-28 09:00 Pacific
Advisory Updated Date: 2026-09-28 09:00 Pacific
Severity:
Important
Issue Overview:
_module_comgen_words_and_files() fed untrusted text (module names read
off disk, LOADEDMODULES, MODULEPATH) straight into `compgen -W`, which
performs a full unquoted-word expansion on its wordlist -- including
command substitution -- as a normal, documented part of its behavior.
A module name, loaded-module entry, or MODULEPATH component containing
e.g. `$(...)` therefore ran arbitrary shell code the moment a user
pressed Tab. (CVE-2026-85013)
Affected Packages:
environment-modules
Issue Correction:
Run yum update environment-modules to update your system.
New Packages:
aarch64:
environment-modules-debugsource-5.6.1-4.amzn2027.aarch64
environment-modules-debuginfo-5.6.1-4.amzn2027.aarch64
environment-modules-5.6.1-4.amzn2027.aarch64
src:
environment-modules-5.6.1-4.amzn2027.src
x86_64:
environment-modules-debugsource-5.6.1-4.amzn2027.x86_64
environment-modules-debuginfo-5.6.1-4.amzn2027.x86_64
environment-modules-5.6.1-4.amzn2027.x86_64