CVE-2023-53603 scsi: qla2xxx: Avoid fcport pointer dereference

What is CVE-2023-53603?

CVE-2023-53603 is a medium-severity vulnerability in Linux kernel, published on 4 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-476

Which versions are affected by CVE-2023-53603?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-53603?

Apply the vendor's patch.

Is CVE-2023-53603 being exploited?

There is no known exploitation of CVE-2023-53603 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-53603, DEBIAN-CVE-2023-53603, GHSA-2795-wfr2-m5v3, UBUNTU-CVE-2023-53603.