Incomplete cleanup in Linux kernel - CVE-2026-90402

Vulnerability identifier: #VU151082

CSH Severity: Low

CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90402

CWE-ID: CWE-459

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to leave a controller device registered after a sysfs-file creation error.

The vulnerability exists due to incomplete cleanup in mhi_register_controller() when creating the optional trigger_edl sysfs file. A local user can cause sysfs_create_file() to fail during controller registration to leave a controller device registered after an error.

Linux kernel
Debian Linux
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)
linux (Debian package)

Install security update from vendor's repository.

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
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/0d5b9e66591d4e2a4376ac82c8cda889a29ba3ee
• https://git.kernel.org/stable/c/4743959aa8d876b5b456a62e8a62eb770db7afe9
• https://git.kernel.org/stable/c/4fb17a7c437f145353e93e6a9791f6db70e1cc63
• https://git.kernel.org/stable/c/7943dc67250fad6ceac0dd089c6ad5776e4be71d

• Incomplete cleanup in Linux kernel mhi host driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more