What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-04 · updated 2026-06-17
• Weakness: CWE-476

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.

Affected products

• Linux kernel: from 5.15.61 before 5.15.121; from 5.18.18 before 5.19; from 5.19.2 before 6.1.40; from 6.2 before 6.4.5 — fixed in 5.15.121, 5.19, 6.1.40, 6.4.5

How to fix

Upgrade to a fixed version: Linux kernel 5.15.121, 5.19, 6.1.40, 6.4.5. Check the vendor advisory for mitigations.

References

• 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

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