Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vdpa_sim: fix cleanup after worker creation failure vdpasim_create() leaves vdpasim->worker as an ERR_PTR when kthread_run_worker() fails. The error path then drops the device reference, which releases the partially initialized simulator. vdpasim_free() unconditionally passes the worker pointer to kthread_destroy_worker(), so the ERR_PTR is dereferenced and can trigger a general protection fault. Store the worker error, clear the pointer, and only clean up the worker when it was successfully initialized. Also make the release path tolerate partially initialized objects by guarding virtqueue and IOTLB cleanup, since the same release path can be reached from other initialization failures. I found this bug myself, though the patch was written with AI assistance.
References
- https://git.kernel.org/stable/c/05ddc94afb69e36df59e88cfa9e5c7bf9d10cfd0
- https://git.kernel.org/stable/c/68b726b3a01fb02a68843781b17d05ef3d759987
- https://git.kernel.org/stable/c/bd670e5dfd2b01fd9692f61fa1456434c54026a4
- https://git.kernel.org/stable/c/ca6f3fa599cb764518df595368b743f856fdb516
- https://git.kernel.org/stable/c/feafa109f031ed111f7f968e447c13985db498e0
FAQ
What is CVE-2026-90130?
CVE-2026-90130 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: vdpa_sim: fix cleanup after worker creation failure vdpasim_create() leaves vdpasim->worker as an ERR_PTR when kthread_run_worker(...
How severe is CVE-2026-90130?
CVSS scoring is not yet available for CVE-2026-90130. Check NVD for updates.
Is there a patch for CVE-2026-90130?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.