Amazon Linux 2023 Security Advisory: ALAS2023-2026-1601
Advisory Released Date: 2026-04-30
Advisory Updated Date: 2026-04-30
Severity:
Important
Issue Overview:
A complete sandbox escape vulnerability exists in Flatpak before 1.16.4. The Flatpak portal accepts paths in the sandbox-expose options which can be app-controlled symlinks pointing at arbitrary paths. Flatpak run mounts the resolved host path in the sandbox, giving apps access to all host files and enabling code execution in the host context. (CVE-2026-34078)
Arbitrary file deletion on the host filesystem in Flatpak before 1.16.4. The caching for ld.so removes outdated cache files without properly checking that the app-controlled path to the outdated cache is in the cache directory, allowing Flatpak applications to delete arbitrary files on the host. (CVE-2026-34079)
Affected Packages:
flatpak
Issue Correction:
Run dnf update flatpak --releasever 2023.11.20260427 or dnf update --advisory ALAS2023-2026-1601 --releasever 2023.11.20260427 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
flatpak-session-helper-debuginfo-1.16.6-1.amzn2023.aarch64
flatpak-debuginfo-1.16.6-1.amzn2023.aarch64
flatpak-devel-1.16.6-1.amzn2023.aarch64
flatpak-tests-debuginfo-1.16.6-1.amzn2023.aarch64
flatpak-debugsource-1.16.6-1.amzn2023.aarch64
flatpak-libs-debuginfo-1.16.6-1.amzn2023.aarch64
flatpak-1.16.6-1.amzn2023.aarch64
flatpak-session-helper-1.16.6-1.amzn2023.aarch64
flatpak-libs-1.16.6-1.amzn2023.aarch64
flatpak-tests-1.16.6-1.amzn2023.aarch64
noarch:
flatpak-selinux-1.16.6-1.amzn2023.noarch
src:
flatpak-1.16.6-1.amzn2023.src
x86_64:
flatpak-tests-debuginfo-1.16.6-1.amzn2023.x86_64
flatpak-libs-1.16.6-1.amzn2023.x86_64
flatpak-debugsource-1.16.6-1.amzn2023.x86_64
flatpak-debuginfo-1.16.6-1.amzn2023.x86_64
flatpak-session-helper-debuginfo-1.16.6-1.amzn2023.x86_64
flatpak-session-helper-1.16.6-1.amzn2023.x86_64
flatpak-1.16.6-1.amzn2023.x86_64
flatpak-tests-1.16.6-1.amzn2023.x86_64
flatpak-libs-debuginfo-1.16.6-1.amzn2023.x86_64
flatpak-devel-1.16.6-1.amzn2023.x86_64