CVE-2026-53042

In the Linux kernel, the following vulnerability has been resolved: fwctl: Fix class init ordering to avoid NULL pointer dereference on device removal CXL is linked before fwctl in drivers/Makefile. Both use `module_init, so `cxl_pci_driver_init()` runs first. When `cxl_pci_probe()` calls `fwctl_register()` and then `device_add()`, fwctl_class is not yet registered because fwctl_init() hasn't run, causing `class_to_subsys()` to return NULL and skip knode_class initialization. On device removal, `class_to_subsys()` returns non-NULL, and `device_del()` calls `klist_del()` on the uninitialized knode, triggering a NULL pointer dereference.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1075f2f590fdac147f8b8010c35b606564b5c7d7	Patch
https://git.kernel.org/stable/c/a28f56988c8e5bb9375806a5cfb0bf54d662ae3f	Patch
https://git.kernel.org/stable/c/a55f80233f384dc89ef3425b2e1dd0e6d44bcf29	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2026-06-24 17:17

Updated : 2026-07-14 19:30

NVD link : CVE-2026-53042

Mitre link : CVE-2026-53042

CVE.ORG link : CVE-2026-53042

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-824

Access of Uninitialized Pointer

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