Improper input validation in Linux kernel - CVE-2026-46105
Published: May 29, 2026
Vulnerability identifier: #VU133089
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46105
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper input validation in the mpt3sas NVMe I/O handling logic when processing oversized NVMe I/O requests. A local user can trigger oversized I/O operations to cause a denial of service.
The issue can lead to a kernel oops because the driver uses a fixed 4K PRP list buffer that supports at most 512 entries, limiting transfers to 2 MiB.
How to mitigate CVE-2026-46105
Install security update from vendor's repository.