Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-90401

Vulnerability identifier: #VU151081

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-90401

CWE-ID: CWE-703

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/3fe5b7c9fb72ccc29bfd0f955b124892af7e3674
• https://git.kernel.org/stable/c/9bb9504e2d8f3d22ef12d51c333dd499f402dc8f

• Improper Check or Handling of Exceptional Conditions in Linux kernel md driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more