SB20260507223 - Deadlock in Linux kernel ntfs3
Published: May 7, 2026
Security Bulletin ID
SB20260507223
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Deadlock (CVE-ID: CVE-2026-43127)
CWE-ID: CWE-833 - Deadlock
CVSSv4: 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
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.
Remediation
Install update from vendor's website.