SB20260507247 - Improper Check or Handling of Exceptional Conditions in Linux kernel trace events

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Main Vulnerability Database SB20260507247

SB20260507247 - Improper Check or Handling of Exceptional Conditions in Linux kernel trace events

Published: May 7, 2026

Security Bulletin ID SB20260507247
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 or Handling of Exceptional Conditions (CVE-ID: CVE-2026-43117)

CWE-ID: CWE-703 - Improper Check or Handling of 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 the superblock reference in the btrfs tracepoint event btrfs_sync_file() when overlay is used on top of btrfs. A local user can trigger file synchronization on the affected filesystem to cause a denial of service.

The issue occurs because the dentry superblock may resolve to the overlay superblock instead of the btrfs superblock.


Remediation

Install update from vendor's website.

References