CVE-2026-46105 Details
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.
A vulnerability exists in the Linux kernel's mpt3sas SCSI driver, where the maximum NVMe I/O request size is improperly managed. The driver allocates a fixed 4K buffer for the PRP list, allowing for a maximum transfer size of 2 MiB. However, the HBA firmware can report larger transfer sizes based on the drive's capabilities. This mismatch can lead to kernel oopses by allowing oversized I/O operations. The issue has been addressed by capping the maximum hardware sectors to the lesser of the reported NVMe transfer size and the 2 MiB driver limit.
Users can update to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched kernel can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/04631f55afc543d5431a2bdee7f6cc0f2c0debe7 | kernel.org | Patch |
| https://git.kernel.org/stable/c/45dcc815fc5539e88154315f36cbcb11d3a52fc2 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e5f9824817c6358b9f9738bdb92dec9e4e794d3c | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.17, < 6.18.30 >= 6.19, < 7.0.7 7.1 rc1 7.1 rc2 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 25, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 30, 2026 | CVE Modified | kernel.org |
| May 28, 2026 | New CVE Received | kernel.org |