CVE-2023-53603: linux kernel Null Dereference — Fix

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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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.15.61 — 5.15.121
linux	linux_kernel	5.18.18 — 5.19
linux	linux_kernel	5.19.2 — 6.1.40
linux	linux_kernel	6.2 — 6.4.5

References

Advisories & Patches

https://git.kernel.org/stable/c/4406fe8a96a946c7ea5724ee59625755a1d9c59d https://git.kernel.org/stable/c/477bc74ad1add644b606bff6ba1284943c42818a https://git.kernel.org/stable/c/6b504d06976fe4a61cc05dedc68b84fadb397f77 https://git.kernel.org/stable/c/7bbeff613ec0560fb2f6f8b405288f3f043adf64

Frequently Asked Questions

What is CVE-2023-53603? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53603? +

CVE-2023-53603 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-53603? +

CVE-2023-53603 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-53603? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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