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CVE-2026-90130

Unknown

Last modified

CVE-2026-90130 is a vulnerability of currently unknown severity. 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.

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 76acfa7bc54f1e3b9dde396e0a3534493419fd6f, < feafa109f031ed111f7f968e447c13985db498e0; >= 76acfa7bc54f1e3b9dde396e0a3534493419fd6f, < 05ddc94afb69e36df59e88cfa9e5c7bf9d10cfd0; >= 76acfa7bc54f1e3b9dde396e0a3534493419fd6f, < 68b726b3a01fb02a68843781b17d05ef3d759987; >= 76acfa7bc54f1e3b9dde396e0a3534493419fd6f, < ca6f3fa599cb764518df595368b743f856fdb516; >= 76acfa7bc54f1e3b9dde396e0a3534493419fd6f, < bd670e5dfd2b01fd9692f61fa1456434c54026a4
LinuxLinux6.4

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90130?
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.
How severe is CVE-2026-90130?
Severity scoring for CVE-2026-90130 is pending analysis.
How do I fix CVE-2026-90130?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST