SB2026052823 - Improper resource shutdown or release in Linux kernel ext4

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Main Vulnerability Database SB2026052823

SB2026052823 - Improper resource shutdown or release in Linux kernel ext4

Published: May 28, 2026

Security Bulletin ID SB2026052823
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper resource shutdown or release (CVE-ID: CVE-2026-46046)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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 resource shutdown or release in ext4_xattr_inode_dec_ref_all() when decrementing extended attribute inode references. A local user can trigger the vulnerable code path to cause a denial of service.

The issue occurs because a buffer head obtained through ext4_get_inode_loc() is not released with brelse(), resulting in a refcount leak when block_csum is false.


Remediation

Install update from vendor's website.

References