CVE-2026-46105 scsi: mpt3sas: Limit NVMe request size to 2 MiB
A local attacker can trigger a kernel oops by issuing oversized NVMe I/O requests exceeding the driver's fixed buffer capacity.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46105?
CVE-2026-46105 is a high-severity denial of service vulnerability in Linux kernel, published on 28 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-46105?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46105?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-46105 being exploited?
There is no known exploitation of CVE-2026-46105 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-46105, DEBIAN-CVE-2026-46105, GHSA-vf7g-hg9j-7w2w, UBUNTU-CVE-2026-46105.