cbcvebase.
CVE-2026-45915
published 2026-05-27

CVE-2026-45915: 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…

medium5.5
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.

Affected

10 ranges
VendorProductVersion rangeFixed in
linuxlinux——
linuxlinux>= 9a53c3a783c2fa9b969628e65695c11c3e51e673 < 7fe0de287e931e07cb96ecf1f449b2ebdb0e11157fe0de287e931e07cb96ecf1f449b2ebdb0e1115
linuxlinux>= 9a53c3a783c2fa9b969628e65695c11c3e51e673 < 9894c79fd9466612d0514be157b5c30cd93aa6459894c79fd9466612d0514be157b5c30cd93aa645
linuxlinux>= 9a53c3a783c2fa9b969628e65695c11c3e51e673 < cd569b87378b9c33ae13c23d6bb9d205d66f7c4bcd569b87378b9c33ae13c23d6bb9d205d66f7c4b
linuxlinux>= 9a53c3a783c2fa9b969628e65695c11c3e51e673 < d3b7ffa90f613938128432c7b2f35b7aa4bdd86bd3b7ffa90f613938128432c7b2f35b7aa4bdd86b
linuxlinux>= 9a53c3a783c2fa9b969628e65695c11c3e51e673 < 955c5d670b5ae07c78f4345e23a895638db96ce1955c5d670b5ae07c78f4345e23a895638db96ce1
linuxlinux>= 9a53c3a783c2fa9b969628e65695c11c3e51e673 < 17866f8a0822d414cb02e621cf003a7d04396ef817866f8a0822d414cb02e621cf003a7d04396ef8
linuxlinux>= 9a53c3a783c2fa9b969628e65695c11c3e51e673 < d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0
linuxlinux>= 9a53c3a783c2fa9b969628e65695c11c3e51e673 < 8cafcb881364af5ef3a8b9fed4db254054033d8a8cafcb881364af5ef3a8b9fed4db254054033d8a
linuxlinux_kernel——