Critical 2026-06-12

Security Advisory: CloudLinux CageFS Mount Escape

CloudLinux CloudLinux 7 CloudLinux 8 CloudLinux 9

A race condition in CageFS mount setup can expose the host root filesystem to jailed users when a large number of concurrent logins trigger overlapping mount operations.

Affected Versions

CageFS 7.4.1 and earlier

Patched Version

CageFS 7.4.3

Default Update CMD

yum update -y

Fix Commands

CloudLinux 9

yum update cagefs
/usr/sbin/cagefsctl --force-update

CloudLinux 8

yum update cagefs
/usr/sbin/cagefsctl --force-update

CloudLinux 7

yum update cagefs
/usr/sbin/cagefsctl --force-update

More Information

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