Linux Linux Kernel Vulnerability Exposed to Unauthenticated Network Attackers

Status: UPDATED  |  Advisory ID: CVE-2026-46177

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

ipmi: Add limits to event and receive message requests

The driver would just fetch events and receive messages until the

BMC said it was done. To avoid issues with BMCs that never say they are

done, add a limit of 10 fetches at a time.

In addition, an si interface has an attn state it can return from the

hardware which is supposed to cause a flag fetch to see if the driver

needs to fetch events or message or a few other things. If the attn

bit gets stuck, it's a similar problem. So allow messages in between

flag fetches so the driver itself doesn't get stuck.

This is a more general fix than the previous fix for the specific bad

BMC, but should fix the more general issue of a BMC that won't stop

saying it has data.

This has been there from the beginning of the driver. It's not a bug

per-se, but it is accounting for bugs in BMCs. (NVD)

What to Do

Monitor Linux's and Siemens's web pages for any future patch releases.

References