Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-90418
Published: September 18, 2026
Vulnerability identifier: #VU151056
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90418
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of an inconsistent dirty state in nilfs_copy_dirty_pages() when copying dirty DAT folios or pages to the shadow page cache. A local user can trigger the dirty-state mismatch to cause a denial of service.
The condition can occur after metadata corruption causes the filesystem to transition to read-only mode.
Affected software
Linux kernel
How to mitigate CVE-2026-90418
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05
- https://git.kernel.org/stable/c/4e1f21e7540b25d83f86b50780836ed7d2afcc93
- https://git.kernel.org/stable/c/5166a21b12f549774f2983fa86d2526ea9e66ace
- https://git.kernel.org/stable/c/66f4ad3ce158902e5f98afea93189972ed8750c2
- https://git.kernel.org/stable/c/f181155baf0c93a74ebe804c6cecbe970e78ee9e