SB2026050956 - Resource exhaustion in Linux kernel btrfs
Published: May 9, 2026
Security Bulletin ID
SB2026050956
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2026-43338)
CWE-ID: CWE-400 - Resource exhaustion
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 resource management in btrfs qgroup ioctls when processing quota group operations. A local user can create many quota groups on a nearly full btrfs filesystem to cause a denial of service.
The issue can trigger a transaction abort with -ENOSPC during delayed reference processing.
Remediation
Install update from vendor's website.