Improper input validation in Linux kernel - CVE-2026-43365
Published: May 9, 2026
Vulnerability identifier: #VU130817
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43365
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause filesystem corruption and a denial of service.
The vulnerability exists due to improper input validation in XFS log roundoff handling when mounting or recovering a crafted XFS filesystem with a malformed superblock. A local user can provide a specially crafted filesystem image to cause filesystem corruption and a denial of service.
The issue can result in corrupt logs and an unmountable filesystem on systems using 4k physical sectors.
How to mitigate CVE-2026-43365
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2ecda4b83749c1fef0c9dea4fd5e8b513aba3e40
- https://git.kernel.org/stable/c/41e91dff2d3974730b5ee50daa8e27ec254cbf91
- https://git.kernel.org/stable/c/446a1f5bb64ba38adb93cb043ff0f7b85e8937ca
- https://git.kernel.org/stable/c/52a8a1ba883defbfe3200baa22cf4cd21985d51a
- https://git.kernel.org/stable/c/5afae524f83d6a18517298491a5624cb0eae5029
- https://git.kernel.org/stable/c/5e7148402dfc4a5b7894d8e97b15e5c2e70924aa
- https://git.kernel.org/stable/c/e88ce9f0536f3b2149afb70625cfc4bd74a4ac6d