SB20260816414 - Improper control of a resource through its lifetime in Linux kernel md driver

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Main Vulnerability Database SB20260816414

SB20260816414 - Improper control of a resource through its lifetime in Linux kernel md driver

Published: August 16, 2026

Security Bulletin ID SB20260816414
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-72108)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


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

The vulnerability exists due to improper state management in dm-thin metadata snapshot handling in drivers/md/dm-thin-metadata.c when reserving or releasing a metadata snapshot and a subsequent metadata commit fails. A local user can issue crafted dmsetup messages to trigger a commit failure and cause metadata inconsistency and a denial of service.

Exploitation requires the ability to manage a thin-pool metadata device and trigger snapshot reserve or release operations under commit-failure conditions.


Remediation

Install update from vendor's website.

References