CVE-2023-53603
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-04

Last updated on: 2026-03-23

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Avoid fcport pointer dereference Klocwork reported warning of NULL pointer may be dereferenced. The routine exits when sa_ctl is NULL and fcport is allocated after the exit call thus causing NULL fcport pointer to dereference at the time of exit. To avoid fcport pointer dereference, exit the routine when sa_ctl is NULL.
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Meta Information
Published
2025-10-04
Last Modified
2026-03-23
Generated
2026-06-16
AI Q&A
2025-10-04
EPSS Evaluated
2026-06-15
NVD
CVE-2023-53603
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 6.2 (inc) to 6.4.5 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Impact Analysis

A NULL pointer dereference in kernel code can cause system instability, crashes, or denial of service. If exploited, it may lead to unexpected system behavior or downtime, impacting system availability.

Executive Summary

This vulnerability in the Linux kernel's scsi qla2xxx driver involves a NULL pointer dereference. Specifically, the code attempts to dereference a pointer named fcport after an exit condition when sa_ctl is NULL, leading to a potential NULL pointer dereference. The fix involves exiting the routine earlier when sa_ctl is NULL to avoid dereferencing the fcport pointer.

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