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CVE-2021-41133 Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux

Description

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. In versions prior to 1.10.4 and 1.12.0, Flatpak apps with direct access to AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can trick portals and other host-OS services into treating the Flatpak app as though it was an ordinary, non-sandboxed host-OS process. They can do this by manipulating the VFS using recent mount-related syscalls that are not blocked by Flatpak's denylist seccomp filter, in order to substitute a crafted `/.flatpak-info` or make that file disappear entirely. Flatpak apps that act as clients for AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can escalate the privileges that the corresponding services will believe the Flatpak app has. Note that protocols that operate entirely over the D-Bus session bus (user bus), system bus or accessibility bus are not affected by this. This is due to the use of a proxy process `xdg-dbus-proxy`, whose VFS cannot be manipulated by the Flatpak app, when interacting with these buses. Patches exist for versions 1.10.4 and 1.12.0, and as of time of publication, a patch for version 1.8.2 is being planned. There are no workarounds aside from upgrading to a patched version.

Produits et versions touchés

Produit Versions touchées Corrigé en
flatpak 1.11 1.11.0 → < 1.12.0 1.12.0
flatpak 1.10 1.10.0 → < 1.10.4 1.10.4
flatpak 1.8 1.8.0 → 1.8.2 Pas de correctif indiqué
fedora 33 Pas de correctif indiqué
debian_linux 11.0 Pas de correctif indiqué

Références

Chronologie

  1. Publiée
  2. Dernière modification

Autres CVE de flatpak

Les 15 CVE de flatpak →
CVE-2026-92162 Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux 7.2 Élevée CVE-2026-96808 In Flatpak before 1.18.1, the revokefs writer, used by the flatpak-system-helper to receive repository data from… 7.4 Élevée CVE-2026-96807 In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink, causing… 4.0 Moyenne CVE-2026-90616 In Flatpak before 1.18.1, a malicious sandboxed app can obtain arbitrary read and write access to files on the host,… 7.4 Élevée
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