SB2026050607 - Improper Check for Unusual or Exceptional Conditions in Linux kernel ext4

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Main Vulnerability Database SB2026050607

SB2026050607 - Improper Check for Unusual or Exceptional Conditions in Linux kernel ext4

Published: May 6, 2026

Security Bulletin ID SB2026050607
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 Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-43068)

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

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 handling of corrupted block group metadata in ext4_mb_find_by_goal() when allocating blocks in ext4. A local user can trigger block allocation on a corrupted ext4 filesystem to cause a denial of service.

The issue can lead to delayed block allocation failures and data loss warnings when the filesystem repeatedly requests blocks from a corrupted block group.


Remediation

Install update from vendor's website.

References