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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-90130

vdpa_sim: fix cleanup after worker creation failure

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 76acfa7bc54f1e3b9dde396e0a3534493419fd6f to < feafa109f031ed111f7f968e447c13985db498e0affected
  • 76acfa7bc54f1e3b9dde396e0a3534493419fd6f to < 05ddc94afb69e36df59e88cfa9e5c7bf9d10cfd0affected
  • 76acfa7bc54f1e3b9dde396e0a3534493419fd6f to < 68b726b3a01fb02a68843781b17d05ef3d759987affected
  • 76acfa7bc54f1e3b9dde396e0a3534493419fd6f to < ca6f3fa599cb764518df595368b743f856fdb516affected
  • 76acfa7bc54f1e3b9dde396e0a3534493419fd6f to < bd670e5dfd2b01fd9692f61fa1456434c54026a4affected

Linux Linux

Default version status: affected

  • 6.4affected
  • 0 to < 6.4unaffected
  • 6.6.157 to ≤ 6.6.*unaffected
  • 6.12.110 to ≤ 6.12.*unaffected
  • 6.18.52 to ≤ 6.18.*unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References