Bug 2393497 (CVE-2025-39678)

Summary: CVE-2025-39678 kernel: platform/x86/amd/hsmp: Ensure sock->metric_tbl_addr is non-NULL
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the AMD HSMP driver in the Linux kernel. A NULL pointer dereference can be triggered due to a missing check when the metric address table is not allocated, resulting in a denial of service.
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Description OSIDB Bzimport 2025-09-05 18:02:24 UTC 
In the Linux kernel, the following vulnerability has been resolved:

platform/x86/amd/hsmp: Ensure sock->metric_tbl_addr is non-NULL

If metric table address is not allocated, accessing metrics_bin will
result in a NULL pointer dereference, so add a check.
Comment 1 Jon Moroney 2025-09-05 21:52:16 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090545-CVE-2025-39678-d4ca@gregkh/T