SB20260917139 - Improper Check for Unusual or Exceptional Conditions in Linux kernel f2fs

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-89832)

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

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 persist inconsistent node data to storage.

The vulnerability exists due to improper error handling in the f2fs node folio error path when processing a node block with a checksum mismatch or inconsistent footer information. A local user can trigger error handling for a corrupted node block to persist inconsistent node data to storage.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3923ec2b98c96dda4a8bfab81d22553dbf0dd6c2
• https://git.kernel.org/stable/c/5b86eab84ac8e9289b5afc52ef88ab18ba5bacab
• https://git.kernel.org/stable/c/ab35ae07f2b5b4e118ea47b88577fc7d0e797b17