CVE-2026-90130 (GCVE-0-2026-90130)
Vulnerability from cvelistv5
Published
2026-09-17 16:06
Modified
2026-10-19 08:58
Severity ?
Summary
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
Impacted products
Vendor Product Version
Linux Linux Version: 76acfa7bc54f1e3b9dde396e0a3534493419fd6f
Version: 76acfa7bc54f1e3b9dde396e0a3534493419fd6f
Version: 76acfa7bc54f1e3b9dde396e0a3534493419fd6f
Version: 76acfa7bc54f1e3b9dde396e0a3534493419fd6f
Version: 76acfa7bc54f1e3b9dde396e0a3534493419fd6f
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{
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          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim.c"
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa_sim: fix cleanup after worker creation failure\n\nvdpasim_create() leaves vdpasim-\u003eworker as an ERR_PTR when\nkthread_run_worker() fails. The error path then drops the device\nreference, which releases the partially initialized simulator.\n\nvdpasim_free() unconditionally passes the worker pointer to\nkthread_destroy_worker(), so the ERR_PTR is dereferenced and can trigger\na general protection fault.\n\nStore the worker error, clear the pointer, and only clean up the worker\nwhen it was successfully initialized. Also make the release path tolerate\npartially initialized objects by guarding virtqueue and IOTLB cleanup,\nsince the same release path can be reached from other initialization\nfailures.\n\nI found this bug myself, though the patch was written with AI assistance."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:58:28.532Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/feafa109f031ed111f7f968e447c13985db498e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/05ddc94afb69e36df59e88cfa9e5c7bf9d10cfd0"
        },
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          "url": "https://git.kernel.org/stable/c/68b726b3a01fb02a68843781b17d05ef3d759987"
        },
        {
          "url": "https://git.kernel.org/stable/c/ca6f3fa599cb764518df595368b743f856fdb516"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd670e5dfd2b01fd9692f61fa1456434c54026a4"
        }
      ],
      "title": "vdpa_sim: fix cleanup after worker creation failure",
      "x_generator": {
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90130",
    "datePublished": "2026-09-17T16:06:31.216Z",
    "dateReserved": "2026-09-11T19:38:34.788Z",
    "dateUpdated": "2026-10-19T08:58:28.532Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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