SB20260816141 - Deadlock in Linux kernel btrfs

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Main Vulnerability Database SB20260816141

SB20260816141 - Deadlock in Linux kernel btrfs

Published: August 16, 2026

Security Bulletin ID SB20260816141
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) Deadlock (CVE-ID: CVE-2026-74572)

CWE-ID: CWE-833 - Deadlock

CVSSv4: 6.8 [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]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper lock management in btree_writepages() and check_bg_is_active() in the btrfs zoned filesystem code when writing metadata extent buffers and committing transactions. A local user can trigger metadata writeback and transaction commit activity to cause a denial of service.

The issue can occur on a zoned btrfs filesystem and may result in a deadlock between metadata writeback and transaction commit.


Remediation

Install update from vendor's website.

References