What’s Vulnerable › Vulnerabilities

CVE-2017-5206

• Severity: critical (CVSS 9.0 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-03-23 · updated 2026-06-17

Description

Firejail before 0.9.44.4, when running on a Linux kernel before 4.8, allows context-dependent attackers to bypass a seccomp-based sandbox protection mechanism via the --allow-debuggers argument.

Affected products

• Firejail Project Firejail: before 0.9.44.4 — fixed in 0.9.44.4

How to fix

Upgrade to a fixed version: Firejail Project Firejail 0.9.44.4. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2017/01/07/5
• http://www.securityfocus.com/bid/97120
• https://blog.lizzie.io/linux-containers-in-500-loc.html#fn.51
• https://firejail.wordpress.com/download-2/release-notes/
• https://github.com/netblue30/firejail/commit/6b8dba29d73257311564ee7f27b9b14758cc693e
• https://security.gentoo.org/glsa/201701-62
• http://www.openwall.com/lists/oss-security/2017/01/07/5
• http://www.securityfocus.com/bid/97120
• https://blog.lizzie.io/linux-containers-in-500-loc.html#fn.51
• https://firejail.wordpress.com/download-2/release-notes/
• https://github.com/netblue30/firejail/commit/6b8dba29d73257311564ee7f27b9b14758cc693e
• https://security.gentoo.org/glsa/201701-62

Get alerted when CVE-2017-5206 or the next vulnerability affects your stack