Bug 2379186 (CVE-2025-38287)

Summary: CVE-2025-38287 kernel: Kernel: Denial of Service in IB/cm component due to improper message handling
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel's InfiniBand (IB) Connection Manager (cm) component. A local user could potentially trigger a denial of service (DoS) due to an improper assertion in the `cm_free_priv_msg()` function. This occurs when the send completion handler attempts to free a message while the `cm_id` has already advanced to another message, leading to a system warning and potential instability.
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Description OSIDB Bzimport 2025-07-10 08:02:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

IB/cm: Drop lockdep assert and WARN when freeing old msg

The send completion handler can run after cm_id has advanced to another
message.  The cm_id lock is not needed in this case, but a recent change
re-used cm_free_priv_msg(), which asserts that the lock is held and
WARNs if the cm_id's currently outstanding msg is different than the one
being freed.
Comment 1 Avinash Hanwate 2025-07-11 10:52:33 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025071011-CVE-2025-38287-b0ff@gregkh/T