Missing Authorization in Linux kernel - CVE-2026-90227

Vulnerability identifier: #VU151254

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-90227

CWE-ID: CWE-862

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
Debian Linux
Red Hat Enterprise Linux for Real Time
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Real Time for NFV
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)
kernel (Red Hat package)
kernel-rt (Red Hat 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
kernel (Red Hat package) - addressed in versions 4.18.0-553.171.1.el8_10, 5.14.0-687.55.1.el9_8
kernel-rt (Red Hat package) - update to 4.18.0-553.171.1.rt7.512.el8_10
linux (Debian package) - update to 6.12.111-1

• 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

• Missing Authorization in Linux kernel nvme host driver
• Debian update for linux
• Red Hat Enterprise Linux 8 update for kernel-rt
• Red Hat Enterprise Linux 8 update for kernel
• Red Hat Enterprise Linux 9 update for kernel
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more