SB2026050936 - Improper Check or Handling of Exceptional Conditions in Linux kernel btrfs

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Main Vulnerability Database SB2026050936

SB2026050936 - Improper Check or Handling of Exceptional Conditions in Linux kernel btrfs

Published: May 9, 2026

Security Bulletin ID SB2026050936
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-2026-43359)

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 item overflow in set received ioctl when processing repeated received UUID values for subvolumes. A local user can invoke the ioctl with the same received UUID for many subvolumes to cause a denial of service.

The issue can abort a transaction and remount the filesystem in read-only mode. Exploitation requires ownership of the subvolume and does not require administrative privileges.


Remediation

Install update from vendor's website.

References