Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: verify orphan file size is not too big In principle orphan file can be arbitrarily large. However orphan replay needs to traverse it all and we also pin all its buffers in memory. Thus filesystems with absurdly large orphan files can lead to big amounts of memory consumed. Limit orphan file size to a sane value and also use kvmalloc() for allocating array of block descriptor structures to avoid large order allocations for sane but large orphan files.
References
- https://git.kernel.org/stable/c/0a6ce20c156442a4ce2a404747bb0fb05d54eeb3
- https://git.kernel.org/stable/c/2b9da798ff0f4d026c5f0f815047393ebe7d8859
- https://git.kernel.org/stable/c/304fc34ff6fc8261138fd81f119e024ac3a129e9
- https://git.kernel.org/stable/c/566a1d6084563bd07433025aa23bcea4427de107
- https://git.kernel.org/stable/c/95a21611b14ae0a401720645245a8db16f040995
- https://git.kernel.org/stable/c/a2d803fab8a6c6a874277cb80156dc114db91921
FAQ
What is CVE-2025-40179?
CVE-2025-40179 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: ext4: verify orphan file size is not too big In principle orphan file can be arbitrarily large. However orphan replay needs to tra...
How severe is CVE-2025-40179?
CVSS scoring is not yet available for CVE-2025-40179. Check NVD for updates.
Is there a patch for CVE-2025-40179?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.