CVE-2017-5940: Firejail before 0.9.44.6 and 0.9.38.x LTS before 0.9.38.10 LTS does not comprehensively address dotfile cas...

Security readout for executives and security teams

CVE-2017-5940 is a Firejail sandbox-escape issue. Older Firejail versions did not fully handle dotfile and symlink edge cases when trying to block access to user files with elevated effective privileges. A local user could bypass intended sandbox isolation. It is not listed in KEV, and the provided sources do not show active exploitation. Exposure is likely limited to Linux systems running affected Firejail versions, especially multi-user systems or desktops where local users can run Firejail and security depends on its sandbox boundary. Internet-facing exposure is not indicated by the provided sources. Prioritize remediation where Firejail protects sensitive workflows or supports untrusted local users. This is not evidenced as an internet-edge emergency, but sandbox escapes can undermine a key security control and should not remain unpatched. Mitigation focus: Upgrade Firejail to 0.9.44.6 or later.; For LTS, upgrade to 0.9.38.10 LTS or later.; Apply relevant distribution security updates, such as Gentoo GLSA-201702-03..

Prepared

Jun 13, 2026, 06:20 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.