PT-2025-40766 · Linux+2 · Linux Kernel+2

Published 2023-06-14 · Updated 2025-12-04 · CVE-2023-53603

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains a flaw in the qla2xxx SCSI driver where a NULL pointer dereference may occur. Specifically, the issue arises when the sa ctl variable is NULL, and the fcport pointer is allocated after the exit call, leading to a dereference of a NULL fcport pointer during routine exit. The issue was identified by Klocwork.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Resource Release

NULL Pointer Dereference

Weakness Enumeration

CWE-404

CWE-476

Related Identifiers

BDU:2026-04441

CVE-2023-53603

SUSE-SU-2025:21040-1

SUSE-SU-2025:21052-1

SUSE-SU-2025:21056-1

SUSE-SU-2025:21064-1

SUSE-SU-2025:4057-1

SUSE-SU-2025:4111-1

SUSE-SU-2025:4128-1

SUSE-SU-2025:4132-1

SUSE-SU-2025:4139-1

SUSE-SU-2025:4140-1

SUSE-SU-2025:4141-1

SUSE-SU-2025:4149-1

SUSE-SU-2025:4189-1

SUSE-SU-2025:4301-1

SUSE-SU-2025:4320-1

Affected Products

Debian

Linux Kernel

Suse

References · 1387

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53603.json · Exploit
• https://git.kernel.org/stable/c/7bbeff613ec0560fb2f6f8b405288f3f043adf64 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:4111-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4301-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53603 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53603 · Vendor Advisory
• https://git.kernel.org/stable/c/477bc74ad1add644b606bff6ba1284943c42818a · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:4128-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4189-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4320-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53603 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:4141-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4149-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4139-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:21052-1 · Vendor Advisory