{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-93046",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-93046"
  ],
  "published": "2026-09-17T16:10:40Z",
  "summary": "software node: Fix software_node_get_reference_args() with index -1",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsoftware node: Fix software_node_get_reference_args() with index -1\n\nThe bounds check for the index passed to\nsoftware_node_get_reference_args() was failing when passed UINT_MAX,\nthis in turn would lead to an out of bound access in the property\narray. Fix the bound check to also cover the UINT_MAX case.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-93046"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6cde06887487b4febd14658c9a246616abcc0097"
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0631384eadebc66d92d2dd72d57a0263c3877bee"
    },
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      "url": "https://git.kernel.org/stable/c/b2fa4e8c7e4a33e02e6aaa8f6df72f84cf4aed75"
    },
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      "url": "https://git.kernel.org/stable/c/4ebf96d5f834aba7f6d0397db4c421f6078171b9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/849076df15129e47dd8db751fa18489419ffea56"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/df5466412b362db7adfa78e3e092fe07ac6769a4"
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      "url": "https://git.kernel.org/stable/c/231bbc04c58f115a505bf3b668ec69ef40a1773b"
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      "source": "kernel CNA",
      "cvss_v3_score": 7.0,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The OOB is in software_node_get_reference_args() in drivers/base/swnode.c, reached only from in-kernel fwnode_property_get_reference_args()/fwnode_find_reference() on local probe/consumer paths (led_get \u2192 fwnode_led_get, swnode_gpio_get_reference, IIO/reset/mailbox); the wrapping index is a kernel argument, not bytes from a packet or remote peer.\nAC:H - Only index==UINT_MAX makes (index+1)*sizeof(*ref) wrap to 0 so the bound is skipped. led_get() passes -1 into fwnode_led_get(), but that value is overwritten by fwnode_property_match_string() for every in-tree con_id (v4l2_subdev_get_privacy_led \"privacy\", yogabook \"pen-icon-led\"); other negative errnos do not wrap on 64-bit, so the attacker cannot force UINT_MAX against a live DEV_PROP_REF.\nPR:L - The lookup runs in driver probe and consumer helpers (led_get from v4l2_subdev_get_privacy_led, swnode_find_gpio, fwnode_find_reference) with no capability check; an unprivileged local user can provoke those paths by opening a consumer device node or causing bind, without init-namespace root or user-namespace tricks.\nUI:N - software_node_get_reference_args() runs automatically inside fwnode_find_reference()/led_get()/swnode_gpio_get_reference during probe or consumer get; no other user must mount media, open a file, or confirm a prompt.\nS:U - The wild software_node_ref_args load, fwnode_handle_get() and any oops stay inside the host kernel; no VM, IOMMU or sandbox boundary is crossed.\nC:H - ref=&ref_array[UINT_MAX] reads a full software_node_ref_args (swnode, fwnode, nargs, args[NR_FWNODE_REFERENCE_ARGS]) from wrapped/wild memory; those pointers and u64 args[] are not a few bounded bytes and can be returned to GPIO/LED/IIO consumers.\nI:H - The OOB bytes are used as ref->swnode/ref->fwnode; software_node_fwnode() or fwnode_handle_get() then software_node_get() \u2192 kobject_get() runs on that pointer, an ops-vtable call and a refcount write at a non-object address \u2014 a control-flow-relevant primitive.\nA:H - The wrapped ref_array[UINT_MAX] pointer is immediately dereferenced (ref->swnode / ref->fwnode / fwnode_handle_get()), which oopses or panics the kernel (KASAN slab-OOB or wild-pointer fault)."
    }
  }
}