CVEvulnerability
CVE-2026-53042
5.5 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-06-24
- Last modified
- 2026-07-14
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-824
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 configurations
• linux linux kernel (>= 6.15 < 6.18.33)
• linux linux kernel (>= 6.19 < 7.0.10)
Related
Weakness · CWE (1)
- CWE-824 Access of Uninitialized Pointer weakness