SB20260824248 - Improper access control in Linux kernel fs
Published: August 24, 2026
Security Bulletin ID
SB20260824248
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2026-74596)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 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]
The vulnerability allows a local user to bypass file integrity protections.
The vulnerability exists due to improper access control in setattr_prepare() when processing truncate operations on fs-verity files. A local user can truncate an fs-verity file to bypass file integrity protections.
The issue can occur on filesystems containing fs-verity files even when fs-verity support is not enabled in the running kernel.
Remediation
Install update from vendor's website.