Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-97547
Published: September 28, 2026
Vulnerability identifier: #VU152653
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97547
CWE-ID: CWE-670
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause data corruption between reflink-related files.
The vulnerability exists due to improper reflink flag handling in xmi_can_exchange_reflink_flags in XFS exchange-range operations when exchanging full-file ranges with XFS_EXCHMAPS_INO1_WRITTEN requested. A local user can exchange full-file ranges between files with shared extents to cause data corruption between reflink-related files.
Hole and unwritten mappings from the first file can be skipped during the exchange.
Affected software
Linux kernel
How to mitigate CVE-2026-97547
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3