FKIE_CVE-2026-80870

Vulnerability from fkie_nvd - Published: 2026-09-04 17:16 - Updated: 2026-09-04 17:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Validate CRIU-restored IDs before idr_alloc The KFD CRIU restore flow restores previously saved object IDs from userspace. For event restore: kfd_criu_restore_event() -> create_signal_event() / create_other_event() -> allocate_event_notification_slot() -> idr_alloc(..., *restore_id, *restore_id + 1, ...) For BO restore: criu_restore_memory_of_gpu() -> idr_alloc(..., bo_priv->idr_handle, ...) In both cases, the restored ID comes from userspace-provided CRIU data. idr_alloc() expects the ID range values to fit within signed int limits. If a restored ID is larger than INT_MAX, it can trigger a WARN in the IDR layer. A kernel WARN is undesirable because it prints a warning trace and may cause a panic or reboot on systems with panic_on_warn enabled. Smatch reported these paths as allowing unchecked userspace values to reach idr_alloc(). Add INT_MAX validation before using restored IDs in: - kfd_criu_restore_event() - criu_restore_memory_of_gpu() If the restored ID is invalid, return -EINVAL. This prevents invalid restore data from reaching the IDR layer and avoids WARN-triggering paths, while keeping valid restore behavior unchanged.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/085ea93bda71fee600cc12a17026598eb10dd1f9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/543ed0f61d56501cc585162da600bbedd7c08c0f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/85043dd49c2f51a37b22618168e3ae59ab92f0d6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89a75e3349c4fae28cbedc711bc924cbc6293da2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cb6311f25a096621ac7ffd91b50d1bb1cfb63a96
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8687018f24037056692c1e93c7d96cc72889d5b
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdkfd/kfd_chardev.c",
            "drivers/gpu/drm/amd/amdkfd/kfd_events.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f8687018f24037056692c1e93c7d96cc72889d5b",
              "status": "affected",
              "version": "40e8a766a761f7fdc8530347527b344fddf6f1a8",
              "versionType": "git"
            },
            {
              "lessThan": "89a75e3349c4fae28cbedc711bc924cbc6293da2",
              "status": "affected",
              "version": "40e8a766a761f7fdc8530347527b344fddf6f1a8",
              "versionType": "git"
            },
            {
              "lessThan": "085ea93bda71fee600cc12a17026598eb10dd1f9",
              "status": "affected",
              "version": "40e8a766a761f7fdc8530347527b344fddf6f1a8",
              "versionType": "git"
            },
            {
              "lessThan": "543ed0f61d56501cc585162da600bbedd7c08c0f",
              "status": "affected",
              "version": "40e8a766a761f7fdc8530347527b344fddf6f1a8",
              "versionType": "git"
            },
            {
              "lessThan": "cb6311f25a096621ac7ffd91b50d1bb1cfb63a96",
              "status": "affected",
              "version": "40e8a766a761f7fdc8530347527b344fddf6f1a8",
              "versionType": "git"
            },
            {
              "lessThan": "85043dd49c2f51a37b22618168e3ae59ab92f0d6",
              "status": "affected",
              "version": "40e8a766a761f7fdc8530347527b344fddf6f1a8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdkfd/kfd_chardev.c",
            "drivers/gpu/drm/amd/amdkfd/kfd_events.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Validate CRIU-restored IDs before idr_alloc\n\nThe KFD CRIU restore flow restores previously saved object IDs from\nuserspace.\n\nFor event restore:\n\n  kfd_criu_restore_event()\n      -\u003e create_signal_event() / create_other_event()\n          -\u003e allocate_event_notification_slot()\n              -\u003e idr_alloc(..., *restore_id, *restore_id + 1, ...)\n\nFor BO restore:\n\n  criu_restore_memory_of_gpu()\n      -\u003e idr_alloc(..., bo_priv-\u003eidr_handle, ...)\n\nIn both cases, the restored ID comes from userspace-provided CRIU data.\n\nidr_alloc() expects the ID range values to fit within signed int\nlimits. If a restored ID is larger than INT_MAX, it can trigger a WARN\nin the IDR layer.\n\nA kernel WARN is undesirable because it prints a warning trace and may\ncause a panic or reboot on systems with panic_on_warn enabled.\n\nSmatch reported these paths as allowing unchecked userspace values to\nreach idr_alloc().\n\nAdd INT_MAX validation before using restored IDs in:\n\n- kfd_criu_restore_event()\n- criu_restore_memory_of_gpu()\n\nIf the restored ID is invalid, return -EINVAL.\n\nThis prevents invalid restore data from reaching the IDR layer and\navoids WARN-triggering paths, while keeping valid restore behavior\nunchanged."
    }
  ],
  "id": "CVE-2026-80870",
  "lastModified": "2026-09-04T17:16:58.860",
  "metrics": {},
  "published": "2026-09-04T17:16:58.860",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/085ea93bda71fee600cc12a17026598eb10dd1f9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/543ed0f61d56501cc585162da600bbedd7c08c0f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/85043dd49c2f51a37b22618168e3ae59ab92f0d6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/89a75e3349c4fae28cbedc711bc924cbc6293da2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cb6311f25a096621ac7ffd91b50d1bb1cfb63a96"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f8687018f24037056692c1e93c7d96cc72889d5b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.