{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7"
            },
            {
              "fixed": "d903d99ffd22b0180bd745a43f221c21bcdd8d7c"
            },
            {
              "fixed": "445204550f894ca325ac80a21e3df177ad073798"
            },
            {
              "fixed": "4379610c79bd88ddbea10e7f6c21e16d4b338c6b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.17.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89450.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/tegra241-cmdqv: Reject a vSID wider than the SID_MATCH field\n\ntegra241_vintf_init_vsid() programs the guest-provided vSID into SID_MATCH,\nwhose VIRT_SID field spans bits [20:1] with bit 0 as the match-enable flag.\nThe HW therefore matches only a 20-bit Stream ID.\n\nThe bound check rejects only virt_sid \u003e UINT_MAX, which admits a value far\nwider than the field. The write \"virt_sid \u003c\u003c 1 | 0x1\" then drops every bit\nabove 20: a virt_sid of 0x80000000 lands as SID_MATCH = 0x1, a valid match\non vSID 0, so the entry aliases the wrong Stream ID. Because vdev-\u003evirt_id\nis guest-controlled, a VMM can trigger it.\n\nValidate virt_sid against the field width with FIELD_MAX(), and program the\nregister with FIELD_PREP() so the value and the field stay consistent.",
  "id": "CVE-2026-89450",
  "modified": "2026-09-15T03:30:35.286857655Z",
  "published": "2026-09-11T19:43:16.060Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4379610c79bd88ddbea10e7f6c21e16d4b338c6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/445204550f894ca325ac80a21e3df177ad073798"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d903d99ffd22b0180bd745a43f221c21bcdd8d7c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89450.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89450"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "iommu/tegra241-cmdqv: Reject a vSID wider than the SID_MATCH field"
}