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CVE-2026-90130 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://git.kernel.org/stable/c/05ddc94afb69e36df59e88cfa9e5c7bf9d10cfd0	kernel.org
https://git.kernel.org/stable/c/68b726b3a01fb02a68843781b17d05ef3d759987	kernel.org
https://git.kernel.org/stable/c/bd670e5dfd2b01fd9692f61fa1456434c54026a4	kernel.org
https://git.kernel.org/stable/c/ca6f3fa599cb764518df595368b743f856fdb516	kernel.org
https://git.kernel.org/stable/c/feafa109f031ed111f7f968e447c13985db498e0	kernel.org

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

1 change record found show changes