Linux Kernel up to 6.3.1 scsi lpfc_sli4_pci_mem_setup null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.3.1. It has been rated as critical. This affects the function lpfc_sli4_pci_mem_setup of the component scsi. This manipulation causes null pointer dereference. This vulnerability is registered as CVE-2023-53754. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.3.1 and classified as critical. Affected by this vulnerability is the function lpfc_sli4_pci_mem_setup of the component scsi. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix ioremap issues in lpfc_sli4_pci_mem_setup() When if_type equals zero and pci_resource_start(pdev, PCI_64BIT_BAR4) returns false, drbl_regs_memmap_p is not remapped. This passes a NULL pointer to iounmap(), which can trigger a WARN() on certain arches. When if_type equals six and pci_resource_start(pdev, PCI_64BIT_BAR4) returns true, drbl_regs_memmap_p may has been remapped and ctrl_regs_memmap_p is not remapped. This is a resource leak and passes a NULL pointer to iounmap(). To fix these issues, we need to add null checks before iounmap(), and change some goto labels.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-53754 since 12/08/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 277771 (Linux Distros Unpatched Vulnerability : CVE-2023-53754), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.243, 5.10.180, 5.15.111, 6.1.28, 6.2.15 or 6.3.2 eliminates this vulnerability. Applying the patch 74d90f92eafe8ccd12827228236a28a94eda6bcc/bab8dc38b1a0a12bc064fc064269033bdcf5b88e/fd8c83d8375b9dac1949f2753485a5c055ebfad0/e6f1ef4a53856ed000b0f7265d7e16dcb00f4243/631d0fab143bef85ea0813596f1dda36e2b9724c/7e5a54d1f00725a739dcd20f616d82eff4f764bd/91a0c0c1413239d0548b5aac4c82f38f6d53a91e is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (277771), EUVD (EUVD-2023-60074) and CERT Bund (WID-SEC-2025-2756). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • NetApp FAS
  • NetApp AFF
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • Microsoft Azure Linux

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 277771
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53754

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.243/5.10.180/5.15.111/6.1.28/6.2.15/6.3.2
Patch: 74d90f92eafe8ccd12827228236a28a94eda6bcc/bab8dc38b1a0a12bc064fc064269033bdcf5b88e/fd8c83d8375b9dac1949f2753485a5c055ebfad0/e6f1ef4a53856ed000b0f7265d7e16dcb00f4243/631d0fab143bef85ea0813596f1dda36e2b9724c/7e5a54d1f00725a739dcd20f616d82eff4f764bd/91a0c0c1413239d0548b5aac4c82f38f6d53a91e

Timelineinfo

12/08/2025 Advisory disclosed
12/08/2025 +0 days CVE reserved
12/08/2025 +0 days VulDB entry created
02/23/2026 +77 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53754 (🔒)
GCVE (CVE): GCVE-0-2023-53754
GCVE (VulDB): GCVE-100-334705
EUVD: 🔒
CERT Bund: WID-SEC-2025-2756 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 12/08/2025 06:16
Updated: 02/23/2026 01:30
Changes: 12/08/2025 06:16 (59), 12/08/2025 10:45 (1), 12/09/2025 03:32 (7), 12/09/2025 06:20 (2), 12/24/2025 05:27 (1), 01/04/2026 10:35 (1), 01/22/2026 05:53 (1), 02/23/2026 01:30 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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