SB2026081294 - Missing Release of Resource after Effective Lifetime in Linux kernel btrfs
Published: August 12, 2026
Security Bulletin ID
SB2026081294
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-68422)
CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a missing release of a reference in merge_reloc_roots() in the btrfs relocation code when handling an unexpected reloc_root for a root. A local user can trigger this condition to cause a denial of service.
The issue results in a root reference leak.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/60a23d4ea169e27403f3bb023bb98036797c0206
- https://git.kernel.org/stable/c/72f673d1c1deb819554d3e7e154f6d84301eb735
- https://git.kernel.org/stable/c/7591d1727067d6063247901ad25c4bdc4e5695c4
- https://git.kernel.org/stable/c/b3d39b03799600c76c33486e2d29b73a771023db
- https://git.kernel.org/stable/c/ce6050bafb4e33377dc17fcc357736bfc351180c