CVE-2026-23042
Null Pointer Dereference in Linux idpf Driver on RDMA-disabled Vports
Publication date: 2026-02-04
Last updated on: 2026-02-04
Assigner: kernel.org
Description
Description
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the Linux kernel's idpf driver related to auxiliary device unplugging when RDMA (Remote Direct Memory Access) is not supported by a virtual port (vport). Specifically, if the vport flags do not include VIRTCHNL2_VPORT_ENABLE_RDMA, the driver does not allocate the vdev_info structure for that vport. However, the function idpf_idc_vport_dev_down() assumes vdev_info is always allocated and references it regardless, leading to a kernel NULL pointer dereference.
The fix involves checking whether vdev_info was allocated before attempting to unplug the auxiliary device, preventing the NULL pointer dereference.
How can this vulnerability impact me? :
This vulnerability can cause a kernel NULL pointer dereference, which typically results in a kernel crash or system instability. Such crashes can lead to denial of service conditions, potentially disrupting normal operations on affected Linux systems using the idpf driver.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know