Bug 2393206 (CVE-2025-38695)

Summary: CVE-2025-38695 kernel: scsi: lpfc: Check for hdwq null ptr when cleaning up lpfc_vport structure
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 Linux kernel lpfc driver, used for Fibre Channel storage adapters. During port initialization, the driver's cleanup routine can dereference a null pointer when hardware queue structures have not been allocated. A local user could trigger this condition and cause a kernel crash, leading to a denial of service until it is restarted.
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Description OSIDB Bzimport 2025-09-04 16:05:12 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: lpfc: Check for hdwq null ptr when cleaning up lpfc_vport structure

If a call to lpfc_sli4_read_rev() from lpfc_sli4_hba_setup() fails, the
resultant cleanup routine lpfc_sli4_vport_delete_fcp_xri_aborted() may
occur before sli4_hba.hdwqs are allocated.  This may result in a null
pointer dereference when attempting to take the abts_io_buf_list_lock for
the first hardware queue.  Fix by adding a null ptr check on
phba->sli4_hba.hdwq and early return because this situation means there
must have been an error during port initialization.
Comment 1 Jon Moroney 2025-09-04 17:06:49 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090451-CVE-2025-38695-f491@gregkh/T