SB20260424276 - Improper control of a resource through its lifetime in Linux kernel ext4

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Main Vulnerability Database SB20260424276

SB20260424276 - Improper control of a resource through its lifetime in Linux kernel ext4

Published: April 24, 2026

Security Bulletin ID SB20260424276
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-31452)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper state management in ext4_setattr() when processing truncate operations that grow a file beyond inline storage capacity. A local user can truncate a file with inline data to a large size and trigger a write operation to cause a denial of service.

The issue occurs when an inode retains the inline data flag even though the file size exceeds the actual inline capacity, leading to a kernel BUG_ON() during sendfile()-triggered writes.


Remediation

Install update from vendor's website.

References