CVE-2026-45915
fat: avoid parent link count underflow in rmdir
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 27, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new unknown vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Linux / Linux
9a53c3a783c2fa9b969628e65695c11c3e51e673 < 7fe0de287e931e07cb96ecf1f449b2ebdb0e1115 9a53c3a783c2fa9b969628e65695c11c3e51e673 < 9894c79fd9466612d0514be157b5c30cd93aa645 9a53c3a783c2fa9b969628e65695c11c3e51e673 < cd569b87378b9c33ae13c23d6bb9d205d66f7c4b 9a53c3a783c2fa9b969628e65695c11c3e51e673 < d3b7ffa90f613938128432c7b2f35b7aa4bdd86b 9a53c3a783c2fa9b969628e65695c11c3e51e673 < 955c5d670b5ae07c78f4345e23a895638db96ce1 9a53c3a783c2fa9b969628e65695c11c3e51e673 < 17866f8a0822d414cb02e621cf003a7d04396ef8 9a53c3a783c2fa9b969628e65695c11c3e51e673 < d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0 9a53c3a783c2fa9b969628e65695c11c3e51e673 < 8cafcb881364af5ef3a8b9fed4db254054033d8a
Linux / Linux
2.6.19
References
git.kernel.org: https://git.kernel.org/stable/c/7fe0de287e931e07cb96ecf1f449b2ebdb0e1115 git.kernel.org: https://git.kernel.org/stable/c/9894c79fd9466612d0514be157b5c30cd93aa645 git.kernel.org: https://git.kernel.org/stable/c/cd569b87378b9c33ae13c23d6bb9d205d66f7c4b git.kernel.org: https://git.kernel.org/stable/c/d3b7ffa90f613938128432c7b2f35b7aa4bdd86b git.kernel.org: https://git.kernel.org/stable/c/955c5d670b5ae07c78f4345e23a895638db96ce1 git.kernel.org: https://git.kernel.org/stable/c/17866f8a0822d414cb02e621cf003a7d04396ef8 git.kernel.org: https://git.kernel.org/stable/c/d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0 git.kernel.org: https://git.kernel.org/stable/c/8cafcb881364af5ef3a8b9fed4db254054033d8a