CVE-2026-74596
Received Received - Intake

fsverity setattr_prepare() Check Removal in Linux Kernel

Publication date: 2026-08-22

Last updated on: 2026-08-22

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: fs,fsverity: remove check for fsverity being enabled in setattr_prepare() The check that fs-verity is available in the kernel is not necessary here. Filesystems could have fsverity files even without fs-verity enabled. In that case, truncate on fsverity file will succeed, what this check is trying to prevent.

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Meta Information

Published
2026-08-22
Last Modified
2026-08-22
Generated
2026-09-12
AI Q&A
2026-08-22
EPSS Evaluated
2026-09-10
NVD
CVE-2026-74596
EUVD
EUVD-2026-64533

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves an unnecessary check for fs-verity being enabled in the setattr_prepare function. The check was preventing truncate operations on fs-verity files even when fs-verity was not enabled, which is incorrect. Filesystems can have fs-verity files without fs-verity being enabled, and truncate operations should succeed in such cases.

Detection Guidance

This vulnerability is specific to the Linux kernel's fsverity implementation and does not provide direct detection commands. It involves a logic error in the setattr_prepare function where an unnecessary check for fsverity being enabled could lead to incorrect truncation behavior on fsverity files. Monitoring kernel logs for filesystem-related errors or unusual truncation events may help identify issues related to this vulnerability.

Impact Analysis

This vulnerability could allow unauthorized truncate operations on files that have fs-verity attributes but where fs-verity is not enabled. This might lead to data corruption or unexpected file modifications if an attacker exploits this behavior.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards. It involves a kernel filesystem issue related to fs-verity checks, which does not impact data protection or privacy requirements central to these regulations.

Mitigation Strategies

Apply the latest Linux kernel security patches to address the fsverity issue. Monitor vendor advisories for updates and ensure your system is running a patched kernel version.

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