PT-2025-46736 · Linux+3 · Linux Kernel+3
Published
2025-09-09
·
Updated
2026-05-07
·
CVE-2025-40179
CVSS v2.0
3.8
Low
| Vector | AV:L/AC:H/Au:S/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a flaw related to orphan file size verification in the ext4 filesystem. An orphan file could be arbitrarily large, potentially leading to excessive memory consumption during orphan replay due to traversing the file and pinning its buffers in memory. The issue is addressed by limiting the orphan file size to a reasonable value and utilizing
kvmalloc() for allocating block descriptor structures, which avoids large order allocations for sizable orphan files.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Allocation of Resources Without Limits
Resource Exhaustion
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Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu
Ext4