Excessive Iteration in Linux kernel - CVE-2026-98924
Published: October 23, 2026
Vulnerability identifier: #VU157578
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-2026-98924
CWE-ID: CWE-834
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service by blocking filesystem unmount operations for an extended period.
The vulnerability exists due to excessive repeated iteration in the Linux kernel's evict_inodes() function when processing inode eviction after removal of a disk that is still in use. A local user can trigger inode eviction under conditions where many referenced inodes occupy the head of the inode list to cause repeated scans after rescheduling, keeping s_umount held for an extended period and blocking concurrent unmount attempts.
Affected software
Linux kernel
How to mitigate CVE-2026-98924
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3