Amazon Linux 2027 Preview Security Advisory: ALAS2027-2026-170
Advisory Release Date: 2026-10-12 09:00 Pacific
Advisory Updated Date: 2026-10-20 15:48 Pacific
Severity:
Important
Issue Overview:
Package updates are available for Amazon Linux 2027 that fix the following vulnerabilities:
CVE-2026-86320:
When use-git-am: true is enabled for a patch source, flatpak-builder invokes git am without disabling git hooks. A malicious source can include a post-applypatch hook, which will be executed automatically when a patch with use-git-am: true is applied. Since git itself runs unsandboxed in host context at this stage, the hook is executed with host privileges, allowing arbitrary code execution on the host.
Affected Packages:
flatpak-builder
Issue Correction:
Run dnf update flatpak-builder or dnf update --advisory ALAS2027-2026-170 to update your system.
New Packages:
aarch64:
flatpak-builder-debugsource-1.4.4-1.amzn2027.0.2.aarch64
flatpak-builder-debuginfo-1.4.4-1.amzn2027.0.2.aarch64
flatpak-builder-1.4.4-1.amzn2027.0.2.aarch64
flatpak-builder-tests-1.4.4-1.amzn2027.0.2.aarch64
src:
flatpak-builder-1.4.4-1.amzn2027.0.2.src
x86_64:
flatpak-builder-debuginfo-1.4.4-1.amzn2027.0.2.x86_64
flatpak-builder-tests-1.4.4-1.amzn2027.0.2.x86_64
flatpak-builder-debugsource-1.4.4-1.amzn2027.0.2.x86_64
flatpak-builder-1.4.4-1.amzn2027.0.2.x86_64