SB20260918441 - Missing Authorization in Linux kernel nvme host driver
Published: September 18, 2026
Security Bulletin ID
SB20260918441
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) Missing Authorization (CVE-ID: CVE-2026-90227)
CWE-ID: CWE-862 - Missing Authorization
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to write data despite read-only access restrictions.
The vulnerability exists due to missing authorization in the NVME_IOCTL_SUBMIT_IO ioctl handler when submitting NVMe I/O commands. A local user can invoke the ioctl with a crafted I/O command to write data despite read-only access restrictions.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/736b7c6adc7a65c4411beff197b6a634f7a6ca27
- https://git.kernel.org/stable/c/95b0591d51dbf9e618d7845883d535e88ad7c8af
- https://git.kernel.org/stable/c/b116e9dae433ff631f94c36c61a7a78fe400ed1e
- https://git.kernel.org/stable/c/b53d495c7f0db46b6748b5ade48371a10dd5d3bc
- https://git.kernel.org/stable/c/c35cd98eed1a863e8dd51073953563cd8c907f68