Description

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.

Affected products

VendorProductVersions
LinuxLinux858ce2f56b5253063f61f6b1c58a6dbf5d71da0b to <a28f56988c8e5bb9375806a5cfb0bf54d662ae3f; 858ce2f56b5253063f61f6b1c58a6dbf5d71da0b to <1075f2f590fdac147f8b8010c35b606564b5c7d7; 858ce2f56b5253063f61f6b1c58a6dbf5d71da0b to <a55f80233f384dc89ef3425b2e1dd0e6d44bcf29
LinuxLinux6.15; 0 to <6.15; 6.18.33 to <=6.18.*; 7.0.10 to <=7.0.*; 7.1 to <=*

References

Authoritative sources

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Generated from the official CVE List on 25 Jun 2026 10:14 UTC.