SB20260815288 - Improper resource shutdown or release in Linux kernel md driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-72439)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

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 resource shutdown or release in the raid10 write request handling in drivers/md/raid10.c when processing write requests that fail before being queued. A local user can trigger write request failure paths to cause a denial of service.

The issue occurs because certain error paths complete the bio without reaching the normal write completion path.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/e045d6ed33f8faa3e3dd6dc33c62ec01e3ad275d
• https://git.kernel.org/stable/c/f94031c94eaebe14a7c9e91720064de0c5a54a6c