CVE-2026-46128: ipmi: Check event message buffer response for bad data
In the Linux kernel, the following vulnerability has been resolved:
ipmi: Check event message buffer response for bad data
The event message buffer response data size got checked later when processing, but check it right after the response comes back. It appears some BMCs may return an empty message instead of an error when fetching events.
There are apparently some new BMCs that make this error, so we need to compensate.
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
Which systems are most relevant to this issue?
Systems running the Linux kernel that use IPMI to fetch BMC event messages are relevant, particularly where a BMC returns an empty event message instead of an error. The listed affected software includes the Linux kernel and Microsoft azl3 kernel 6.6.139.1-1.
What access does an attacker need according to the severity vector?
The provided vector indicates local access with low privileges is required, and no user interaction is required. It does not indicate a network-based attack path.