Incorrect calculation in Linux kernel - CVE-2026-89829
Published: September 17, 2026
Vulnerability identifier: #VU150458
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89829
CWE-ID: CWE-682
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise confidentiality, integrity, and availability.
The vulnerability exists due to incorrect node footer validation in f2fs_sanity_check_node_footer() when writing node folios. A local user can trigger validation with an incorrect node identifier to compromise confidentiality, integrity, and availability.
Affected software
Linux kernel
How to mitigate CVE-2026-89829
Install security update from vendor's repository.