CVE-2025-15576 Jail chroot escape via fd exchange with a different jail

If two sibling jails are restricted to separate filesystem trees, which is to say that neither of the two jail root directories is an ancestor of the other, jailed processes may nonetheless be able to access a shared directory via a nullfs mount, if the administrator has configured one. In this...

CVE-2025-15576

CVE-2025-15576 describes a jail/chroot escape in FreeBSD. When two sibling jails are restricted to separate filesystem trees, processes in the two jails can still exchange directory descriptors via a unix domain socket and access a shared directory mounted with nullfs. During a filesystem name lo...

FreeBSD 安全漏洞

FreeBSD is a Unix-like operating system developed by the FreeBSD Foundation. There is a security vulnerability in FreeBSD, which stems from the kernel’s failure to properly check the jail root directory during file system name lookups. This vulnerability could allow jail processes to obtain full...