{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "757d2b1fdf5b7d6eead5963a49b5780617987ab8"
            },
            {
              "fixed": "80c231f5577229d1e90a1e312b3095f9502f8625"
            },
            {
              "fixed": "fa5c0827f0b7bac6d0a188f10118151769ae68fd"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98002.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Fix ineffective error check in nested domain allocation\n\namd_iommu_pdom_id_alloc() returns an int: a domain ID on success, or the\nnegative errno from ida_alloc_range() when the ID space is exhausted or\nmemory is short.  amd_iommu_alloc_domain_nested() stores that return value\nin gdom_info-\u003ehdom_id, which is a u32, and only then tests it:\n\n\tgdom_info-\u003ehdom_id = amd_iommu_pdom_id_alloc();\n\tif (gdom_info-\u003ehdom_id \u003c= 0) {\n\nThe assignment discards the sign, so -ENOSPC becomes 0xffffffe4 and the\ntest never fires.  The nested domain is then set up with a host domain ID\nthat was never allocated, instead of the allocation failing with -ENOSPC.\n\nKeep the value in an int, test it there, and store it only once it is\nknown to be valid, which is what the other amd_iommu_pdom_id_alloc()\ncallers already do.",
  "id": "CVE-2026-98002",
  "modified": "2026-09-26T03:31:00.219472346Z",
  "published": "2026-09-25T10:23:29.929Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/80c231f5577229d1e90a1e312b3095f9502f8625"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa5c0827f0b7bac6d0a188f10118151769ae68fd"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98002.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98002"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "iommu/amd: Fix ineffective error check in nested domain allocation"
}