SB20260529195 - Improper input validation in Linux kernel scsi mpt3sas driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: CVE-2026-46105)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/04631f55afc543d5431a2bdee7f6cc0f2c0debe7
• https://git.kernel.org/stable/c/45dcc815fc5539e88154315f36cbcb11d3a52fc2
• https://git.kernel.org/stable/c/e5f9824817c6358b9f9738bdb92dec9e4e794d3c