RHSA-2021:0306 — Security Advisory

Red Hat Security Advisory: flatpak security update

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Severity

Important

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · February 1, 2021

Updated · November 22, 2025

Topic

An update for flatpak is now available for Red Hat Enterprise Linux 8.1 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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

Security Fix(es):

  • flatpak: sandbox escape via spawn portal (CVE-2021-21261)

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.

Related CVEs

RHSA-2021:0306 — Red Hat Security Advisory: flatpak security update | PulseLinux