Improper Initialization in Linux kernel - CVE-2026-43408
Published: May 8, 2026
Vulnerability identifier: #VU130775
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-43408
CWE-ID: CWE-665
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 a denial of service.
The vulnerability exists due to improper initialization in ceph_mdsc_build_path() callers when handling error paths after building Ceph path information. A local user can trigger a failed ceph_mdsc_build_path() call and subsequent ceph_mdsc_free_path_info() use of an uninitialized ceph_path_info structure to cause a denial of service.
The issue may occur because ceph_mdsc_build_path() initializes the structure only on success, while callers may still free it after an error.
How to mitigate CVE-2026-43408
Install security update from vendor's repository.