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

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Summary

CVECVE-2026-43347
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 14:16:44 UTC
Updated2026-05-08 14:16:44 UTC
DescriptionIn 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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7be190e4bdd2bd1aca84afef06bb755c06a85473 edde62571f7602d83243ca51729ce42d22ea04d2 git Not specified
CNA Linux Linux affected 7be190e4bdd2bd1aca84afef06bb755c06a85473 59bd9088336d2bb7e713dcf4df5cbda86bb3c611 git Not specified
CNA Linux Linux affected 7be190e4bdd2bd1aca84afef06bb755c06a85473 85d98669fa7f1d3041d962515e45ee6e392db6f8 git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.24 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.14 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/edde62571f7602d83243ca51729ce42d22ea04d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/59bd9088336d2bb7e713dcf4df5cbda86bb3c611 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/85d98669fa7f1d3041d962515e45ee6e392db6f8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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