Improper control of a resource through its lifetime in Linux kernel - CVE-2026-89601
Published: September 12, 2026
Vulnerability identifier: #VU149210
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89601
CWE-ID: CWE-664
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause loss of inode updates.
The vulnerability exists due to improper handling of inode dirty state in ext2_setsize() and ext2_xattr_set2() when updating file sizes or extended attributes of IS_SYNC inodes. A local user can update the file size or extended attributes of an IS_SYNC inode to cause loss of inode updates.
Affected software
Linux kernel
How to mitigate CVE-2026-89601
Install security update from vendor's repository.