CVE-2025-40179In 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.
Updated under an hour ago ()
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Deferred
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
No affected products are listed yet.
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
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