Debian Security Advisory

DSA-4984-1 flatpak -- security update

Date Reported:
12 Oct 2021
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 995935.
In Mitre's CVE dictionary: CVE-2021-41133.
More information:

It was discovered that sandbox restrictions in Flatpak, an application deployment framework for desktop apps, could be bypassed for a Flatpak app with direct access to AF_UNIX sockets, by manipulating the VFS using mount-related syscalls that are not blocked by Flatpak's denylist seccomp filter.

Details can be found in the upstream advisory at

For the stable distribution (bullseye), this problem has been fixed in version 1.10.5-0+deb11u1.

We recommend that you upgrade your flatpak packages.

For the detailed security status of flatpak please refer to its security tracker page at: