Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-89576
Published: September 12, 2026
Vulnerability identifier: #VU149234
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89576
CWE-ID: CWE-772
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service through metadata block exhaustion.
The vulnerability exists due to improper resource release in metadata_take_snap() when incrementing metadata block references fails after allocating a shadow superblock. A local user can cause snapshot creation to fail after a shadow block is allocated to cause a denial of service through metadata block exhaustion.
Affected software
Linux kernel
How to mitigate CVE-2026-89576
Install security update from vendor's repository.