CVE-2026-46177: ipmi: Add limits to event and receive message requests
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.141.1-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-46177?
CVE-2026-46177 has a high severity score of 7.5.
How do I fix CVE-2026-46177?
To fix CVE-2026-46177, ensure that your system is updated with the latest Linux kernel patches that include limits on IPMI event and message requests.
What impact does CVE-2026-46177 have on my system?
CVE-2026-46177 could lead to system instability due to unlimited IPMI message fetching, potentially causing a Denial of Service.
What software is affected by CVE-2026-46177?
CVE-2026-46177 specifically affects the Linux kernel's IPMI driver.
When was CVE-2026-46177 published?
CVE-2026-46177 was published on May 28, 2026.