CVE-2026-46177
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
A vulnerability in the Linux kernel related to limits on event and message requests has been resolved. The driver could continuously fetch events, potentially causing issues with BMCs that never signal completion. A limit of 10 fetches at a time has been introduced.
Risk Assessment
Organizations may experience performance or stability issues when BMCs continuously report available data. This can lead to communication bottlenecks and reduced system efficiency.
Recommendation
It is recommended to update the Linux kernel to the latest version to benefit from the introduced fixes. Monitoring BMC performance may also help identify potential issues.
Original NVD description (English source)
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.