PT-2025-46594 · Ext4+3 · Ext4+3
Published
2025-01-01
·
Updated
2026-02-24
·
CVE-2025-40119
CVSS v2.0
4.3
Medium
| Vector | AV:A/AC:H/Au:S/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.17.0-rc2 #1134
Description
The Linux kernel contains a flaw in the ext4 file system related to memory management during initialization. Specifically, a null pointer dereference can occur in the
ext4 mb init() function when ext4 mb avg fragment size destroy() is called with an uninitialized sbi->s mb avg fragment size. This happens when groupinfo slab cache allocation fails. The lack of null pointer checking in ext4 mb avg fragment size destroy() leads to the dereference, potentially causing system instability. The same fix was applied to ext4 mb largest free orders destroy().Recommendations
Update to a version newer than 6.17.0-rc2 #1134.
Exploit
Fix
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu
Ext4