CVE-2026-45915 Details
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.
A vulnerability has been identified in the Linux kernel's handling of corrupted FAT images. These images can leave a directory inode with an incorrect link count, allowing the rmdir operation to improperly reduce the link count to zero. This issue triggers a warning in the filesystem management code. The vulnerability arises because the rmdir operation does not account for the presence of subdirectories before dropping the link count.
The vulnerability has been addressed in the Linux kernel. Users should upgrade to the latest version where this issue has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/17866f8a0822d414cb02e621cf003a7d04396ef8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/7fe0de287e931e07cb96ecf1f449b2ebdb0e1115 | kernel.org | Patch |
| https://git.kernel.org/stable/c/8cafcb881364af5ef3a8b9fed4db254054033d8a | kernel.org | Patch |
| https://git.kernel.org/stable/c/955c5d670b5ae07c78f4345e23a895638db96ce1 | kernel.org | Patch |
| https://git.kernel.org/stable/c/9894c79fd9466612d0514be157b5c30cd93aa645 | kernel.org | Patch |
| https://git.kernel.org/stable/c/cd569b87378b9c33ae13c23d6bb9d205d66f7c4b | kernel.org | Patch |
| https://git.kernel.org/stable/c/d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d3b7ffa90f613938128432c7b2f35b7aa4bdd86b | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.19, < 5.10.252 >= 5.11, < 5.15.202 >= 5.16, < 6.1.165 >= 6.2, < 6.6.128 >= 6.7, < 6.12.75 >= 6.13, < 6.18.14 >= 6.19, < 6.19.4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 24, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 27, 2026 | New CVE Received | kernel.org |