CVE-2025-40192 Revert "ipmi: fix msg stack when IPMI is disconnected"
A bug in the Linux kernel IPMI driver can cause an infinite loop and system hang if the BMC misbehaves, requiring a kernel patch.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-40192?
CVE-2025-40192 is a denial of service vulnerability in Linux, published on 12 Nov 2025. 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:
Revert "ipmi: fix msg stack when IPMI is disconnected"
This reverts commit c608966f3f9c2dca596967501d00753282b395fc.
This patch has a subtle bug that can cause the IPMI driver to go into an infinite loop if the BMC misbehaves in a certain way. Apparently certain BMCs do misbehave this way because several reports have come in recently about this.
Which versions are affected by CVE-2025-40192?
How do I fix CVE-2025-40192?
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-2025-40192 being exploited?
There is no known exploitation of CVE-2025-40192 in the wild and no public exploit code.
Sources
Also known as AZL-70106, BELL-CVE-2025-40192, DEBIAN-CVE-2025-40192, GHSA-7w8j-pr8f-4w8p, ROOT-OS-DEBIAN-13-CVE-2025-40192, ROOT-OS-UBUNTU-2204-CVE-2025-40192 and 2 more.