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OpenAdvisories
High RHSA-2021:0307 1 CVE

Red Hat Security Advisory: flatpak security update

Published Sep 16, 2024 · Updated Nov 22, 2025

Ecosystem: Red Hat

Fixed packages 9

ReleasePackageFixed in
Red Hat · RHEL 8.2 EUS rhel_eus:8.2::appstream flatpak 0:1.6.2-4.el8_2
Red Hat · RHEL 8.2 EUS rhel_eus:8.2::appstream flatpak-debuginfo 0:1.6.2-4.el8_2
Red Hat · RHEL 8.2 EUS rhel_eus:8.2::appstream flatpak-debugsource 0:1.6.2-4.el8_2
Red Hat · RHEL 8.2 EUS rhel_eus:8.2::appstream flatpak-libs 0:1.6.2-4.el8_2
Red Hat · RHEL 8.2 EUS rhel_eus:8.2::appstream flatpak-libs-debuginfo 0:1.6.2-4.el8_2
Red Hat · RHEL 8.2 EUS rhel_eus:8.2::appstream flatpak-selinux 0:1.6.2-4.el8_2
Red Hat · RHEL 8.2 EUS rhel_eus:8.2::appstream flatpak-session-helper 0:1.6.2-4.el8_2
Red Hat · RHEL 8.2 EUS rhel_eus:8.2::appstream flatpak-session-helper-debuginfo 0:1.6.2-4.el8_2
Red Hat · RHEL 8.2 EUS rhel_eus:8.2::appstream flatpak-tests-debuginfo 0:1.6.2-4.el8_2

Vulnerabilities 1

  • High 7.3
    CVE-2021-21261

    Flatpak sandbox escape via spawn portal

    Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. A bug was discovered in the `flatpak-portal` service that can allow sandboxed applications to execute arbitrary code on the host system (a sandbox escape). Th…

    Flatpak Flatpak flatpak flatpak Debian Ubuntu Alpine

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=1917430
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_0307.json
  • report
    https://access.redhat.com/security/cve/CVE-2021-21261
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2021-21261
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2021-21261
  • article
    https://github.com/flatpak/flatpak/security/advisories/GHSA-4ppf-fxf6-vxg2