SB20260815286 - Memory leak in Linux kernel md driver

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Main Vulnerability Database SB20260815286

SB20260815286 - Memory leak in Linux kernel md driver

Published: August 15, 2026

Security Bulletin ID SB20260815286
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Memory leak (CVE-ID: CVE-2026-72437)

CWE-ID: CWE-401 - Missing release of memory 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 memory leak in raid1_read_request() in the md/raid1 subsystem when handling retried reads with REQ_NOWAIT set and the read would block on retry. A local user can trigger this condition to cause a denial of service.

The issue occurs when a pre-allocated r1_bio already exists for the retried read and wait_read_barrier() fails.


Remediation

Install update from vendor's website.

References