CVE-2026-43347

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43347", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.003Z", "datePublished": "2026-05-08T13:39:32.598Z", "dateUpdated": "2026-08-05T12:27:23.879Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:27:23.879Z"}, "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>From 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 -> 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": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - On affected Monaco/QCS8300 systems, the unreserved hypervisor-owned PFNs enter the global page allocator, and the reference platform has enabled Ethernet RX paths that allocate pages in response to unauthenticated network traffic. A local memory-pressure trigger also exists, but network reachability is the highest defensible vector.\nAC:L - There is no race or fragile timing requirement; the attacker can repeatedly induce allocations until the allocator hands out one of the bad PFNs. The need for affected hardware/firmware is part of the vulnerable configuration, not attack complexity.\nPR:N - For the network-trigger scenario, sending packets to a reachable interface requires no credentials, capabilities, or prior local account. The allocator and driver path is reached before any application-level authentication.\nUI:N - Exploitation does not require a victim user to open a file, mount anything, or perform an action. Packet delivery or repeated allocation pressure is sufficient.\nS:U - The observed impact is a crash of the Linux kernel on the affected device. The issue does not demonstrate compromise of the Gunyah hypervisor or another security authority.\nC:N - The bug causes attempted access to hypervisor-owned physical pages to abort, not a successful memory read primitive. No evidence indicates disclosure of Linux or hypervisor memory.\nI:N - Although Linux may attempt to allocate, zero, or DMA-map the bad PFNs, the described outcome is a fatal external abort rather than attacker-controlled modification or code execution. No reliable integrity impact is shown.\nA:H - The fix commit reports fatal Synchronous External Abort exceptions and kernel crashes when the kernel accesses these PFNs. Repeated allocation pressure can retrigger the crash, causing high availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/boot/dts/qcom/monaco.dtsi"], "versions": [{"version": "7be190e4bdd2bd1aca84afef06bb755c06a85473", "lessThan": "edde62571f7602d83243ca51729ce42d22ea04d2", "status": "affected", "versionType": "git"}, {"version": "7be190e4bdd2bd1aca84afef06bb755c06a85473", "lessThan": "59bd9088336d2bb7e713dcf4df5cbda86bb3c611", "status": "affected", "versionType": "git"}, {"version": "7be190e4bdd2bd1aca84afef06bb755c06a85473", "lessThan": "85d98669fa7f1d3041d962515e45ee6e392db6f8", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/boot/dts/qcom/monaco.dtsi"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.24", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.14", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.18.24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.19.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.0"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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", "versions": [{"lessThan": "edde62571f7602d83243ca51729ce42d22ea04d2", "status": "affected", "version": "7be190e4bdd2bd1aca84afef06bb755c06a85473", "versionType": "git"}, {"lessThan": "59bd9088336d2bb7e713dcf4df5cbda86bb3c611", "status": "affected", "version": "7be190e4bdd2bd1aca84afef06bb755c06a85473", "versionType": "git"}, {"lessThan": "85d98669fa7f1d3041d962515e45ee6e392db6f8", "status": "affected", "version": "7be190e4bdd2bd1aca84afef06bb755c06a85473", "versionType": "git"}]}, {"defaultStatus": "affected", "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", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.24", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.14", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F789B310-F070-49AF-AD11-2773C8D3A364", "versionEndExcluding": "6.18.24", "versionStartIncluding": "6.14", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D6A8A074-BBF4-4803-ABED-519A839435BB", "versionEndExcluding": "6.19.14", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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>From 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 -> 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"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\narm64: dts: qcom: monaco: Reservar la regi\u00f3n completa de metadatos de Gunyah\n\nObservamos excepciones espurias de \u2019Synchronous External Abort\u2019 (ESR=0x 96000010) y fallos del kernel en plataformas basadas en Monaco. Estas fallas son causadas por el kernel que accede inadvertidamente a memoria propiedad del hipervisor que no est\u00e1 correctamente marcada como reservada.\n\nDel registro de arranque, el hipervisor de Qualcomm informa el rango de memoria en 0x 91a80000 de tama\u00f1o 0x 80000 (512 KiB) como propiedad del hipervisor:\nqhee_hyp_assign_remove_memory: 0x 91a80000/0x 80000 -> ret 0\n\nSin embargo, el mapa de memoria EFI proporcionado por el firmware solo reserva el subrango 0x 91a40000-0x 91a87fff (288 KiB). La porci\u00f3n restante (0x 91a88000-0x 91afffff) se informa incorrectamente como memoria convencional (de la depuraci\u00f3n de efi):\nefi: 0x 000091a40000-0x 000091a87fff [Reservado...]\nefi: 0x 000091a88000-0x 0000938fffff [Convencional...]\n\nComo resultado, el asignador puede entregar PFNs dentro de la regi\u00f3n propiedad del hipervisor, causando abortos fatales cuando el kernel accede a esas direcciones.\n\nA\u00f1adir una reserva de memoria para los metadatos del hipervisor Gunyah en 0x 91a80000 (512 KiB) y marcarla como no-map para que Linux no mapee ni asigne desde esta \u00e1rea.\n\nPara que conste:\nVersi\u00f3n de Hyp: gunyah-e78adb36e debug (2025-11-17 05:38:05 UTC)\nVersi\u00f3n de UEFI: 6.0.260122.BOOT.MXF.1.0.c1-00449-KODIAKLA-1"}], "id": "CVE-2026-43347", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-08T14:16:44.777", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/59bd9088336d2bb7e713dcf4df5cbda86bb3c611"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/85d98669fa7f1d3041d962515e45ee6e392db6f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/edde62571f7602d83243ca51729ce42d22ea04d2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: arm64: dts: qcom: monaco: Reserve full Gunyah metadata region", "id": "2468065", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468065"}, "csaw": false, "cwe": "CWE-908", "details": ["A flaw was found in the Linux kernel. An issue with the system's firmware incorrectly identifying a section of memory reserved for the Gunyah hypervisor as available for general use can lead to the kernel attempting to access this protected area. This unauthorized memory access can cause the system to become unstable and crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-43347", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43347\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43347\nhttps://lore.kernel.org/linux-cve-announce/2026050837-CVE-2026-43347-723d@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7be190e4bdd2bd1aca84afef06bb755c06a85473,edde62571f7602d83243ca51729ce42d22ea04d2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7be190e4bdd2bd1aca84afef06bb755c06a85473,59bd9088336d2bb7e713dcf4df5cbda86bb3c611)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7be190e4bdd2bd1aca84afef06bb755c06a85473,85d98669fa7f1d3041d962515e45ee6e392db6f8)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.24,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.14,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-08T20:00:12.749911+00:00", "updated": "2026-05-15T21:30:08.894630+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}