Description
In the Linux kernel, the following vulnerability has been resolved: fat: avoid parent link count underflow in rmdir Corrupted FAT images can leave a directory inode with an incorrect i_nlink (e.g. 2 even though subdirectories exist). rmdir then unconditionally calls drop_nlink(dir) and can drive i_nlink to 0, triggering the WARN_ON in drop_nlink(). Add a sanity check in vfat_rmdir() and msdos_rmdir(): only drop the parent link count when it is at least 3, otherwise report a filesystem error.
References (8)
Core 8
Core References
Scores
CVSS v3
5.5
EPSS
0.0016
EPSS Percentile
5.6%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
Status
published
Products (26)
linux/Kernel
2.6.19 - 5.10.252linux
linux/Kernel
5.11.0 - 5.15.202linux
linux/Kernel
5.16.0 - 6.1.165linux
linux/Kernel
6.13.0 - 6.18.14linux
linux/Kernel
6.19.0 - 6.19.4linux
linux/Kernel
6.2.0 - 6.6.128linux
linux/Kernel
6.7.0 - 6.12.75linux
Linux/Linux
< 2.6.19
Linux/Linux
2.6.19
Linux/Linux
5.10.252 - 5.10.*
... and 16 more
Published
May 27, 2026
Tracked Since
May 27, 2026