Bug 2363714 (CVE-2023-53124)

Summary: CVE-2023-53124 kernel: scsi: mpt3sas: Fix NULL pointer access in mpt3sas_transport_port_add()
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: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-02 16:02:53 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: mpt3sas: Fix NULL pointer access in mpt3sas_transport_port_add()

Port is allocated by sas_port_alloc_num() and rphy is allocated by either
sas_end_device_alloc() or sas_expander_alloc(), all of which may return
NULL. So we need to check the rphy to avoid possible NULL pointer access.

If sas_rphy_add() returned with failure, rphy is set to NULL. We would
access the rphy in the following lines which would also result NULL pointer
access.
Comment 1 Avinash Hanwate 2025-05-05 06:37:54 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050232-CVE-2023-53124-9900@gregkh/T