SB20260815287 - 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-2026-72438)

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 in raid10_handle_discard() in drivers/md/raid10.c when handling discard requests and discard split allocation failures. A local user can trigger discard failure paths to cause a denial of service.

The issue is caused by missing releases of writes_pending and barrier references on certain error paths.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/393d687131d8aa8c7e4de2cb494438e145d20fc2
• https://git.kernel.org/stable/c/d1324b41dabd26787559efaeb430643c627c1eb0