CVE-2026-43347 (GCVE-0-2026-43347)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:39 – Updated: 2026-05-08 13:39
VLAI?
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7be190e4bdd2bd1aca84afef06bb755c06a85473 , < edde62571f7602d83243ca51729ce42d22ea04d2 (git)
Affected: 7be190e4bdd2bd1aca84afef06bb755c06a85473 , < 59bd9088336d2bb7e713dcf4df5cbda86bb3c611 (git)
Affected: 7be190e4bdd2bd1aca84afef06bb755c06a85473 , < 85d98669fa7f1d3041d962515e45ee6e392db6f8 (git)
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    Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/boot/dts/qcom/monaco.dtsi"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          ],
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          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.14"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.14",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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                  "vulnerable": true
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                  "vulnerable": true
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                  "vulnerable": true
                }
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: dts: qcom: monaco: Reserve full Gunyah metadata region\n\nWe observe spurious \"Synchronous External Abort\" exceptions\n(ESR=0x96000010) and kernel crashes on Monaco-based platforms.\nThese faults are caused by the kernel inadvertently accessing\nhypervisor-owned memory that is not properly marked as reserved.\n\n\u003eFrom boot log, The Qualcomm hypervisor reports the memory range\nat 0x91a80000 of size 0x80000 (512 KiB) as hypervisor-owned:\nqhee_hyp_assign_remove_memory: 0x91a80000/0x80000 -\u003e ret 0\n\nHowever, the EFI memory map provided by firmware only reserves the\nsubrange 0x91a40000\u20130x91a87fff (288 KiB). The remaining portion\n(0x91a88000\u20130x91afffff) is incorrectly reported as conventional\nmemory (from efi debug):\nefi:   0x000091a40000-0x000091a87fff [Reserved...]\nefi:   0x000091a88000-0x0000938fffff [Conventional...]\n\nAs a result, the allocator may hand out PFNs inside the hypervisor\nowned region, causing fatal aborts when the kernel accesses those\naddresses.\n\nAdd a reserved-memory carveout for the Gunyah hypervisor metadata\nat 0x91a80000 (512 KiB) and mark it as no-map so Linux does not\nmap or allocate from this area.\n\nFor the record:\nHyp version: gunyah-e78adb36e debug (2025-11-17 05:38:05 UTC)\nUEFI Ver: 6.0.260122.BOOT.MXF.1.0.c1-00449-KODIAKLA-1"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-08T13:39:32.598Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/edde62571f7602d83243ca51729ce42d22ea04d2"
        },
        {
          "url": "https://git.kernel.org/stable/c/59bd9088336d2bb7e713dcf4df5cbda86bb3c611"
        },
        {
          "url": "https://git.kernel.org/stable/c/85d98669fa7f1d3041d962515e45ee6e392db6f8"
        }
      ],
      "title": "arm64: dts: qcom: monaco: Reserve full Gunyah metadata region",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43347",
    "datePublished": "2026-05-08T13:39:32.598Z",
    "dateReserved": "2026-05-01T14:12:56.003Z",
    "dateUpdated": "2026-05-08T13:39:32.598Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43347",
      "date": "2026-05-09",
      "epss": "0.00017",
      "percentile": "0.04127"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43347\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-08T14:16:44.777\",\"lastModified\":\"2026-05-08T14:16:44.777\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\narm64: dts: qcom: monaco: Reserve full Gunyah metadata region\\n\\nWe observe spurious \\\"Synchronous External Abort\\\" exceptions\\n(ESR=0x96000010) and kernel crashes on Monaco-based platforms.\\nThese faults are caused by the kernel inadvertently accessing\\nhypervisor-owned memory that is not properly marked as reserved.\\n\\n\u003eFrom boot log, The Qualcomm hypervisor reports the memory range\\nat 0x91a80000 of size 0x80000 (512 KiB) as hypervisor-owned:\\nqhee_hyp_assign_remove_memory: 0x91a80000/0x80000 -\u003e ret 0\\n\\nHowever, the EFI memory map provided by firmware only reserves the\\nsubrange 0x91a40000\u20130x91a87fff (288 KiB). The remaining portion\\n(0x91a88000\u20130x91afffff) is incorrectly reported as conventional\\nmemory (from efi debug):\\nefi:   0x000091a40000-0x000091a87fff [Reserved...]\\nefi:   0x000091a88000-0x0000938fffff [Conventional...]\\n\\nAs a result, the allocator may hand out PFNs inside the hypervisor\\nowned region, causing fatal aborts when the kernel accesses those\\naddresses.\\n\\nAdd a reserved-memory carveout for the Gunyah hypervisor metadata\\nat 0x91a80000 (512 KiB) and mark it as no-map so Linux does not\\nmap or allocate from this area.\\n\\nFor the record:\\nHyp version: gunyah-e78adb36e debug (2025-11-17 05:38:05 UTC)\\nUEFI Ver: 6.0.260122.BOOT.MXF.1.0.c1-00449-KODIAKLA-1\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/59bd9088336d2bb7e713dcf4df5cbda86bb3c611\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/85d98669fa7f1d3041d962515e45ee6e392db6f8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/edde62571f7602d83243ca51729ce42d22ea04d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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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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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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