Incomplete cleanup in Linux kernel - CVE-2026-90216
Published: September 19, 2026
Vulnerability identifier: #VU151274
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90216
CWE-ID: CWE-459
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to leave UBI devices attached after failed module initialization.
The vulnerability exists due to incomplete cleanup in ubi_init_attach() when rolling back initialization after an mtd= parameter specifies an explicit UBI device number. A local privileged user can configure an explicit UBI device number and trigger a later initialization failure to leave UBI devices attached after failed module initialization.
Affected software
Linux kernel
How to mitigate CVE-2026-90216
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/4417ab6ecad01cf2d01045ef8104c95a66b0e893
- https://git.kernel.org/stable/c/552e565ed8846e7db143e4a6bdf3f5677453c686
- https://git.kernel.org/stable/c/5b0a6b554e12a97f9771a9a9f4ea1f5457373c73
- https://git.kernel.org/stable/c/6b92e66ec6dd8019e8efb2a568ef7c967c5a18c5
- https://git.kernel.org/stable/c/83c978921688af40dcab6db74882d1ff9b0b765c
- https://git.kernel.org/stable/c/87b3da4acb860605643ebee312178f13b20744cf
- https://git.kernel.org/stable/c/9754f049d5f1945d4c691d1f52824eb8daf8f9be
- https://git.kernel.org/stable/c/e3f7e58189bc222971ddc860f1716f37e51ba996