Deadlock in Linux kernel - CVE-2026-43127
Published: May 7, 2026
Vulnerability identifier: #VU130616
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-2026-43127
CWE-ID: CWE-833
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 a circular locking dependency in run_unpack_ex when handling NTFS metadata operations. A local user can trigger lock acquisition in a conflicting order to cause a denial of service.
The issue arises from an AB-BA deadlock between wnd->rw_lock and ni->file.run_lock.
How to mitigate CVE-2026-43127
Install security update from vendor's repository.