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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| flatpak | flatpak | >= 1.8.0, <= 1.8.2, >= 1.10.0, < 1.10.4, >= 1.11.0, < 1.12.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | flatpak | 1.12.1-1 | — |
| Debian 13 | flatpak | 1.12.1-1 | — |
| Debian 12 | flatpak | 1.12.1-1 | — |
| Debian 11 | flatpak | 1.10.5-0+deb11u1 | DSA-4984-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | flatpak | 1.6.5-0ubuntu0.4 | USN-5191-1 |
| Ubuntu 18.04 LTS | flatpak | 1.0.9-0ubuntu0.4 | USN-5191-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | flatpak +3 | 1.8.5-4.el8_4 | RHSA-2021:4042 |
| RHEL 7 | flatpak +2 | 1.0.9-12.el7_9 | RHSA-2021:4044 |
| RHEL 7 | flatpak-builder | 1.0.0-12.el7_9 | RHSA-2021:4044 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.2 EUS | flatpak +3 | 1.6.2-6.el8_2 | RHSA-2021:4107 |
| RHEL 8.1 EUS | flatpak +1 | 1.0.9-5.el8_1 | RHSA-2021:4106 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | flatpak +3 | 1.8.5-4.el8_4 | ALSA-2021:4042, ALEA-2021:4539 |
| AlmaLinux 8 | flatpak-devel | 1.8.5-5.el8_5 | ALEA-2021:4539 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | flatpak | 1.8.5-4.el8 | RLSA-2021:4042 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | flatpak | 1.10.5-4.9.1 | SUSE-SU-2021:3472-1 |
| SLES 15 SP2 | flatpak | 1.10.5-4.9.1 | SUSE-SU-2021:3472-1 |
| SLES 15 SP1 | flatpak | 1.2.3-150100.4.8.1 | SUSE-SU-2022:3284-1 |
| SLES 15 | flatpak | 0.10.4-150000.4.13.1 | SUSE-SU-2022:3439-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP1 | flatpak | 1.2.3-150100.4.8.1 | SUSE-SU-2022:3284-1 |
| SLES for SAP 15 | flatpak | 0.10.4-150000.4.13.1 | SUSE-SU-2022:3439-1 |
| SLE HPC 15 SP1 | flatpak | 1.2.3-150100.4.8.1 | SUSE-SU-2022:3284-1 |
| SLE HPC 15 | flatpak | 0.10.4-150000.4.13.1 | SUSE-SU-2022:3439-1 |
| SUSE Enterprise Storage 6 | flatpak | 1.2.3-150100.4.8.1 | SUSE-SU-2022:3284-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | flatpak | 1.12.1-1.1 | openSUSE-SU-2024:11574-1 |
| openSUSE Leap 15.3 | flatpak | 1.10.5-4.9.1 | openSUSE-SU-2021:3472-1 |
| openSUSE Leap 15.2 | flatpak | 1.10.5-lp152.3.9.1 | openSUSE-SU-2021:1400-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | flatpak | 1.12.2-r0 | — |
| Alpine v3.23 | flatpak | 1.12.2-r0 | — |
| Alpine v3.22 | flatpak | 1.12.2-r0 | — |
| Alpine v3.21 | flatpak | 1.12.2-r0 | — |
| Alpine v3.20 | flatpak | 1.12.2-r0 | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | flatpak | 1.12.2-r0 | — |
| Alpine v3.18 | flatpak | 1.12.2-r0 | — |
| Alpine v3.17 | flatpak | 1.12.2-r0 | — |
| Alpine v3.16 | flatpak | 1.12.2-r0 | — |
| Alpine v3.15 | flatpak | 1.12.2-r0 | — |
| Alpine v3.14 | flatpak | 1.10.5-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | flatpak +2 | 1.0.9-10.amzn2.0.2 | ALAS2-2023-2076 |
| Amazon Linux 2 | flatpak-builder | 1.0.0-10.amzn2.0.2 | ALAS2-2023-2076 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | flatpak +3 | 1.8.5-4.el8_4 | ELSA-2021-4042 |
| Oracle Linux 7 | flatpak +2 | 1.0.9-12.el7_9 | ELSA-2021-4044 |
| Oracle Linux 7 | flatpak-builder | 1.0.0-12.el7_9 | ELSA-2021-4044 |
Advisories 21
- ALEA-2021:4539 flatpak bug fix and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2021:4042 Important: flatpak security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2022-0432 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 11, 2026
- WID-SEC-2022-0302 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten BSI CERT-Bund (WID) · Oct 11, 2026
- RHSA-2021:4044 Red Hat Security Advisory: flatpak security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5191-1 flatpak vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4984-1 flatpak - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:4042 Important: flatpak security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:11574-1 flatpak-1.12.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3439-1 Security update for flatpak SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3472-1 Security update for flatpak SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1400-1 Security update for flatpak SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3284-1 Security update for flatpak SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2021:4106 Red Hat Security Advisory: flatpak security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2021:4107 Red Hat Security Advisory: flatpak security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2021:4042 Red Hat Security Advisory: flatpak security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- SUSE-SU-2021:3472-1 Security update for flatpak SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-1446 Red Hat Enterprise Linux und Oracle Linux: Schwachstelle ermöglicht Privilegieneskalation BSI CERT-Bund (WID) · Jun 8, 2023
- ALAS2-2023-2076 Important: flatpak security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 7, 2023
- ELSA-2021-4042 Important: flatpak security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 1, 2021
- ELSA-2021-4044 Important: flatpak security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 1, 2021
References
- https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q
- https://github.com/flatpak/flatpak/commit/1330662f33a55e88bfe18e76de28b7922d91a999
- https://github.com/flatpak/flatpak/commit/26b12484eb8a6219b9e7aa287b298a894b2f34ca
- https://github.com/flatpak/flatpak/commit/462fca2c666e0cd2b60d6d2593a7216a83047aaf
- https://github.com/flatpak/flatpak/commit/4c34815784e9ffda5733225c7d95824f96375e36
- https://github.com/flatpak/flatpak/commit/89ae9fe74c6d445bb1b3a40e568d77cf5de47e48
- https://github.com/flatpak/flatpak/commit/9766ee05b1425db397d2cf23afd24c7f6146a69f
- https://github.com/flatpak/flatpak/commit/a10f52a7565c549612c92b8e736a6698a53db330
- https://github.com/flatpak/flatpak/commit/e26ac7586c392b5eb35ff4609fe232c52523b2cf
- FEDORA-2021-4b201d15e6 vendor-advisory
- DSA-4984 vendor-advisory
- [oss-security] 20211026 WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006 mailing-list
- FEDORA-2021-c5a9c85737 vendor-advisory
- GLSA-202312-12 vendor-advisory