PT-2025-44117 · Linux+5 · Linux Kernel+5
Published
2025-09-19
·
Updated
2026-05-07
·
CVE-2025-40049
CVSS v2.0
4.6
Medium
| Vector | AV:L/AC:L/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 within the Squashfs file system related to uninitialized values in the
squashfs get parent function. This issue arises when open by handle at() is invoked with a file handle containing an invalid parent inode number, specifically that of a symbolic link instead of a directory. The squashfs get parent() function then accesses the uninitialized parent member field, leading to a potential error. The fix involves initializing the parent field with the invalid inode number 0, which will return an EINVAL error. Previously, inodes shared the parent field with the block list start field, which has been removed to allow the parent field to contain the invalid inode number 0.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Weakness Enumeration
Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Squashfs
Suse
Ubuntu