Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-97557
Published: September 28, 2026
Vulnerability identifier: #VU152646
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97557
CWE-ID: CWE-772
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper reference count management in cifs_queue_oplock_break() when queueing oplock-break work. A remote attacker can trigger repeated oplock breaks while prior work remains queued to cause a denial of service.
The issue can be triggered when interacting with a slow-responding server.
Affected software
Linux kernel
How to mitigate CVE-2026-97557
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3