drm/panthor: Add vm_bind region with kbo range overlap check

{
  "id": "623180e25d274333bb2dc8001fa763aa58478b34da3c4925455faede90b87cd0",
  "url": "https://osv.dev/vulnerability/CVE-2026-90409",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/panthor: Add vm_bind region with kbo range overlap check",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/panthor: Add vm_bind region with kbo range overlap check When a VM is created, caller has to specify the range of the address space carve-out set aside for mapping kernel BO's. That means vm_bind mappings of UM-exposed BO's should not intersect with that region, but at the moment we're not checking this. At first, I thought of giving these values to drm_gpuvm_init() through its reserve_{offset, range} arguments, but it turns out that is meant for VM address spans that are not managed through the usual drm_gpuvm split/merge circuit, so storing the end of the user VA range at VM creation time and doing a quick check in the vm_bind ioctl path was the simplest workaround. The new check also makes sure vm_bind range doesn't overflow the size of a 64-bit unsigned integer. That was already being done further down the call stack inside drm_gpuvm_sm_map -> drm_gpuvm_range_valid, but it's best to fail early in the driver before GPUVM functions are invoked so that we won't waste time allocating vm_bind context resources.",
    "evidence": "osv:CVE-2026-90409",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.57",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-90409",
      "aliases": [
        "CVE-2026-90409"
      ],
      "affected": [
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              "type": "GIT",
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                  "fixed": "985f5e12f3cdf43030e13c2bbd154913133b5c3f"
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        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.10.0"
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.13.0"
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                {
                  "fixed": "6.18.57"
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.19.0"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90409.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.357172425Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/276753aaad65e6f7dac7989a600c1c2d3a382c1a",
        "https://git.kernel.org/stable/c/761cf9c63274a5b711c3dc829601723215710d2d",
        "https://git.kernel.org/stable/c/985f5e12f3cdf43030e13c2bbd154913133b5c3f",
        "https://git.kernel.org/stable/c/f2be47fa8e225968eb66863657143fe900ec4bca",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90409.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-90409",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90409.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-90409",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521357,
  "published_at": "2026-09-17T16:09:36.74+00:00"
}