SB2026050938 - Allocation of Resources Without Limits or Throttling in Linux kernel btrfs

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Main Vulnerability Database SB2026050938

SB2026050938 - Allocation of Resources Without Limits or Throttling in Linux kernel btrfs

Published: May 9, 2026

Security Bulletin ID SB2026050938
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) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-43361)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

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 size limits in btrfs snapshot creation for received subvolumes when snapshotting a previously received subvolume repeatedly. A local user can create many snapshots of a received subvolume to cause a denial of service.

The issue can abort a transaction and force the filesystem into read-only mode. Exploitation does not require CAP_SYS_ADMIN and relies on operations permitted by inode_owner_or_capable().


Remediation

Install update from vendor's website.

References