159 lines
9.5 KiB
JSON
159 lines
9.5 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-43347",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-05-01T14:12:56.003Z",
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"datePublished": "2026-05-08T13:39:32.598Z",
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"dateUpdated": "2026-08-05T12:27:23.879Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:27:23.879Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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 0x91a40000–0x91a87fff (288 KiB). The remaining portion\n(0x91a88000–0x91afffff) 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"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/arm64/boot/dts/qcom/monaco.dtsi"
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],
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"versions": [
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{
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"version": "7be190e4bdd2bd1aca84afef06bb755c06a85473",
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"lessThan": "edde62571f7602d83243ca51729ce42d22ea04d2",
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"status": "affected",
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"status": "affected",
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{
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"product": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/arm64/boot/dts/qcom/monaco.dtsi"
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],
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"versions": [
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{
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"version": "6.14",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.14",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.24",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.19.14",
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"lessThanOrEqual": "6.19.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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},
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/edde62571f7602d83243ca51729ce42d22ea04d2"
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},
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{
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"url": "https://git.kernel.org/stable/c/59bd9088336d2bb7e713dcf4df5cbda86bb3c611"
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},
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{
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"url": "https://git.kernel.org/stable/c/85d98669fa7f1d3041d962515e45ee6e392db6f8"
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}
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],
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"title": "arm64: dts: qcom: monaco: Reserve full Gunyah metadata region",
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