SB2026081577 - Improper control of a resource through its lifetime in Linux kernel md driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-74373)

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

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 accounting in the md raid1 and raid10 subsystems when handling split md cloned bios on the error path. A local user can trigger read requests that cause failed bios to be split and resubmitted to cause a denial of service.

The issue occurs when a failed bio is split and resubmitted via bio_submit_split_bioset().

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/ba976e3501111d11c550848b3b7341a73035f582
• https://git.kernel.org/stable/c/bb8d7ea74206b419aa05d7773a15a923b668c9f0