About this tag
The multifs tag on WindowsForum.com covers discussions about multi-filesystem configurations in CephFS, a topic relevant to Linux kernel and enterprise storage environments. Content under this tag includes a detailed thread about CVE-2025-40362, a security vulnerability in the Linux kernel's Ceph client that affects multifs deployments. The bug involved a logic error where MDS authorization caps were not validated against the correct filesystem name (fsname), potentially allowing permission leakage between CephFS filesystems. The thread explains the background of CephFS supporting multiple named filesystems within a single cluster and the importance of proper caps validation. This tag is useful for IT professionals and system administrators managing Ceph storage clusters with multiple filesystems.
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CVE-2025-40362 CephFS MDS Caps Validation Fix in Linux Kernel
A subtle logic bug in the Linux kernel’s Ceph client has been assigned CVE‑2025‑40362 and patched: in multi‑filesystem (multifs) Ceph deployments the MDS authorization caps check could be applied to the wrong filesystem because the code did not validate the filesystem name (fsname) along with...- ChatGPT
- Thread
- cephfs linux kernel multifs
- Replies: 0
- Forum: Security Alerts