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ALSA-2026:80497 — Important: flatpak security update

Affected: AlmaLinux:9: flatpak, AlmaLinux:9: flatpak-devel, AlmaLinux:9: flatpak-libs, AlmaLinux:9: flatpak-selinux, AlmaLinux:9: flatpak-session-helper

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.

Security Fix(es):

* flatpak: Flatpak: Arbitrary code execution via missing symlink protection (CVE-2026-90616) * flatpak: flatpak: Arbitrary write access as root via extra-data extraction (CVE-2026-96275) * flatpak: flatpak: Buffer overflow in OCI delta stream path names on 32-bit systems (CVE-2026-96280) * flatpak: Flatpak: Local privilege escalation via symlink traversal in revokefs writer (CVE-2026-96808)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

fkie_cve-2026-96275

A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` is resolved via path operations that follow symlinks, and blob names from `xa.extra-data-sources` are not sanitized against `..` traversal.

RHSA-2026:80497 — security update for flatpak

security update for flatpak

SUSE-SU-2026:4610-1 — Security update for flatpak

Security update for flatpak

UBUNTU-CVE-2026-96275

Affected: Ubuntu:Pro:18.04:LTS: flatpak, Ubuntu:Pro:20.04:LTS: flatpak, Ubuntu:Pro:22.04:LTS: flatpak, Ubuntu:Pro:24.04:LTS: flatpak, Ubuntu:26.04:LTS: flatpak