Bug 2383483 (CVE-2025-38456)

Summary: CVE-2025-38456 kernel: ipmi:msghandler: Fix potential memory corruption in ipmi_create_user()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-07-25 16:01:44 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ipmi:msghandler: Fix potential memory corruption in ipmi_create_user()

The "intf" list iterator is an invalid pointer if the correct
"intf->intf_num" is not found.  Calling atomic_dec(&intf->nr_users) on
and invalid pointer will lead to memory corruption.

We don't really need to call atomic_dec() if we haven't called
atomic_add_return() so update the if (intf->in_shutdown) path as well.
Comment 1 Jon Moroney 2025-07-25 17:28:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025072506-CVE-2025-38456-3c0a@gregkh/T