Bug 2425096 (CVE-2023-54102)

Summary: CVE-2023-54102 kernel: scsi: lpfc: Prevent lpfc_debugfs_lockstat_write() buffer overflow
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: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-12-24 14:02:33 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: lpfc: Prevent lpfc_debugfs_lockstat_write() buffer overflow

A static code analysis tool flagged the possibility of buffer overflow when
using copy_from_user() for a debugfs entry.

Currently, it is possible that copy_from_user() copies more bytes than what
would fit in the mybuf char array.  Add a min() restriction check between
sizeof(mybuf) - 1 and nbytes passed from the userspace buffer to protect
against buffer overflow.
Comment 1 Alexander B 2025-12-25 02:55:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122410-CVE-2023-54102-7dd5@gregkh/T