SB20260918279 - Improper Check or Handling of Exceptional Conditions in Linux kernel md driver
Published: September 18, 2026
Security Bulletin ID
SB20260918279
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-90401)
CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause data inconsistency.
The vulnerability exists due to improper handling of exceptional conditions in the Linux kernel md RAID1, RAID10, and RAID456 personalities when processing REQ_NOWAIT write requests. A local user can submit a write request that succeeds on one mirror while another returns EAGAIN to cause data inconsistency.
Remediation
Install update from vendor's website.