CVE-2025-40179ext4: verify orphan file size is not too big
- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 87% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 7 months later
· 7 months later
Published
- 6 months later
· 6 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Deferred.
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 – < 95a21611b14ae0a401720645245a8db16f040995
- affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 – < 566a1d6084563bd07433025aa23bcea4427de107
- affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 – < 304fc34ff6fc8261138fd81f119e024ac3a129e9
- affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 – < a2d803fab8a6c6a874277cb80156dc114db91921
- affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 – < 2b9da798ff0f4d026c5f0f815047393ebe7d8859
- affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 – < 0a6ce20c156442a4ce2a404747bb0fb05d54eeb3
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.195 – ≤ 5.15.*
- unaffected 6.1.157 – ≤ 6.1.*
- unaffected 6.6.113 – ≤ 6.6.*
- unaffected 6.12.54 – ≤ 6.12.*
- unaffected 6.17.4 – ≤ 6.17.*
- unaffected 6.18 – ≤ *
References
References6
- https://git.kernel.org/stable/c/95a21611b14ae0a401720645245a8db16f040995 (opens in a new tab)
- https://git.kernel.org/stable/c/566a1d6084563bd07433025aa23bcea4427de107 (opens in a new tab)
- https://git.kernel.org/stable/c/304fc34ff6fc8261138fd81f119e024ac3a129e9 (opens in a new tab)
- https://git.kernel.org/stable/c/a2d803fab8a6c6a874277cb80156dc114db91921 (opens in a new tab)
- https://git.kernel.org/stable/c/2b9da798ff0f4d026c5f0f815047393ebe7d8859 (opens in a new tab)
- https://git.kernel.org/stable/c/0a6ce20c156442a4ce2a404747bb0fb05d54eeb3 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-150395 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-40179)Record last updated .