SB20260918295 - Improper initialization in Linux kernel md driver
Published: September 18, 2026
Security Bulletin ID
SB20260918295
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper initialization (CVE-ID: CVE-2026-90385)
CWE-ID: CWE-665 - Improper Initialization
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to improper initialization in the md/raid1 serial pool creation logic when adding a new rdev to an existing RAID1 array with serialize policy enabled. A local privileged user can add a new rdev to a configured RAID1 array to cause a denial of service.
Remediation
Install update from vendor's website.