SB20260917136 - Incorrect calculation in Linux kernel f2fs
Published: September 17, 2026
Security Bulletin ID
SB20260917136
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect calculation (CVE-ID: CVE-2026-89829)
CWE-ID: CWE-682 - Incorrect Calculation
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.