PT-2025-35982 · Linux+4 · Linux Kernel+4
Syzbot
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Published
2025-07-11
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Updated
2026-05-26
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CVE-2025-38709
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains an issue where a loop device block size could be changed underneath a mounted filesystem. This discrepancy between the block device block size and the superblock block size could lead to confusion in areas like
fs/buffer.c, specifically triggering a warning in the getblk slow() function due to a mismatch in requested buffer size and block device block size. The fix involves obtaining exclusive hold of the loop device before changing its block size, preventing modification if another process already has exclusive ownership.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Improper Locking
Time Of Check To Time Of Use
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Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Suse
Ubuntu