What’s Vulnerable › Vulnerabilities

CVE-2026-46105: scsi: mpt3sas: Limit NVMe request size to 2 MiB

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-28 · updated 2026-06-25

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: mpt3sas: Limit NVMe request size to 2 MiB The HBA firmware reports NVMe MDTS values based on the underlying drive capability. However, because the driver allocates a fixed 4K buffer for the PRP list, accommodating at most 512 entries, the driver supports a maximum I/O transfer size of 2 MiB. Limit max_hw_sectors to the smaller of the reported MDTS and the 2 MiB driver limit to prevent issuing oversized I/O that may lead to a kernel oops.

Affected products

• Linux kernel: from 6.17 before 6.18.30; from 6.19 before 7.0.7; 7.1-rc1, 7.1-rc2 — fixed in 6.18.30, 7.0.7

How to fix

Upgrade to a fixed version: Linux kernel 6.18.30, 7.0.7. Check the vendor advisory for mitigations.

References

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

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