Deadlock in Linux kernel - CVE-2026-97619
Published: September 28, 2026
Vulnerability identifier: #VU152580
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97619
CWE-ID: CWE-833
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper synchronization of write accounting in the io_uring read/write completion handling when asynchronous writes complete while filesystem shutdown is freezing the superblock. A local user can issue an asynchronous write and initiate filesystem shutdown to cause a denial of service.
The condition occurs when the ring owner blocks in freeze_super() before queued task work runs.
Affected software
Linux kernel
How to mitigate CVE-2026-97619
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3