arm64: dts: qcom: monaco: Reserve full Gunyah metadata region

{
  "id": "8295c72f3431bbbb9763c132353727559beb48397d86faf6a74b97cf75072df2",
  "url": "https://osv.dev/vulnerability/CVE-2026-43347",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "arm64: dts: qcom: monaco: Reserve full Gunyah metadata region",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: arm64: dts: qcom: monaco: Reserve full Gunyah metadata region We observe spurious \"Synchronous External Abort\" exceptions (ESR=0x96000010) and kernel crashes on Monaco-based platforms. These faults are caused by the kernel inadvertently accessing hypervisor-owned memory that is not properly marked as reserved. >From boot log, The Qualcomm hypervisor reports the memory range at 0x91a80000 of size 0x80000 (512 KiB) as hypervisor-owned: qhee_hyp_assign_remove_memory: 0x91a80000/0x80000 -> ret 0 However, the EFI memory map provided by firmware only reserves the subrange 0x91a40000–0x91a87fff (288 KiB). The remaining portion (0x91a88000–0x91afffff) is incorrectly reported as conventional memory (from efi debug): efi: 0x000091a40000-0x000091a87fff [Reserved...] efi: 0x000091a88000-0x0000938fffff [Conventional...] As a result, the allocator may hand out PFNs inside the hypervisor owned region, causing fatal aborts when the kernel accesses those addresses. Add a reserved-memory carveout for the Gunyah hypervisor metadata at 0x91a80000 (512 KiB) and mark it as no-map so Linux does not map or allocate from this area. For the record: Hyp version: gunyah-e78adb36e debug (2025-11-17 05:38:05 UTC) UEFI Ver: 6.0.260122.BOOT.MXF.1.0.c1-00449-KODIAKLA-1",
    "evidence": "osv:CVE-2026-43347",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.24",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.14",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-43347",
      "aliases": [
        "CVE-2026-43347"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7be190e4bdd2bd1aca84afef06bb755c06a85473"
                },
                {
                  "fixed": "edde62571f7602d83243ca51729ce42d22ea04d2"
                },
                {
                  "fixed": "59bd9088336d2bb7e713dcf4df5cbda86bb3c611"
                },
                {
                  "fixed": "85d98669fa7f1d3041d962515e45ee6e392db6f8"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43347.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.14.0"
                },
                {
                  "fixed": "6.18.24"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.14"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43347.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.821377674Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/59bd9088336d2bb7e713dcf4df5cbda86bb3c611",
        "https://git.kernel.org/stable/c/85d98669fa7f1d3041d962515e45ee6e392db6f8",
        "https://git.kernel.org/stable/c/edde62571f7602d83243ca51729ce42d22ea04d2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43347.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43347",
        "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/2026/43xxx/CVE-2026-43347.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-43347",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488005,
  "published_at": "2026-05-08T13:39:32.598+00:00"
}