From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EEF513803DB for ; Fri, 8 May 2026 13:39:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778247592; cv=none; b=fNWZmXEr4b3bw1ju++1AuVAehXwiVkP2WA2r21pTR/oZvkZidYYRfMPxNXrzYPjnbCfL6E0KKlfNiaqSWLpgFksFDSl+ExnkmtKP9p8u+JLUfrIYgdiPDaeXl3WvFnB+1auKPtndILC4QphSyPuOFucadfb66QmluwC/BEL4yO0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778247592; c=relaxed/simple; bh=iaAlXz6acNxKhqo+0R915Yvdi1+oZ1vcJf5TTdNMQ0c=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=nRvrpfuDKtKnJSVjAS827/jgrLnut8ba1DVNc2Cq/ZkvaTuQLYnuS8SsJIV3qYAlMbB+Gfw5obuu5c/vP3fpNWywqHLbwlbbByckMNSlg4GptJZjnGsi8uj0orlpPksAvrXCrokHmQWpAxOjmW+7s5XxvujPQuEKiadvpSnAkns= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=W84iyWEr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="W84iyWEr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 34AAAC2BCB0; Fri, 8 May 2026 13:39:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778247591; bh=iaAlXz6acNxKhqo+0R915Yvdi1+oZ1vcJf5TTdNMQ0c=; h=From:To:Cc:Subject:Date:Reply-To:From; b=W84iyWErJNw5eSxqq25j0MzB4WVkWkaK6yMex+foM5gbcaGmGoto05QQt0R4rhkbn GFyVeW9Axu7av7ISfEbYU9rCAe0EOzEBwZJ/bcfpy6zTZsFSVH+zYN7U8tH37CqIls CcBGZK2Z+rnWfCOzyg/b+wpnIVP88Rp2/2a74k74= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43347: arm64: dts: qcom: monaco: Reserve full Gunyah metadata region Date: Fri, 8 May 2026 15:39:38 +0200 Message-ID: <2026050837-CVE-2026-43347-723d@gregkh> X-Mailer: git-send-email 2.54.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3243; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=uNtiUv36eMKNoY52HeX4b1yU2f0CtPLwXz/qtUFbNFg=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/n89afcj7S+RLiXLbT77zdjb9nr55Rt7mCX28Aq6cW ex3d/2o7IhlYRBkYpAVU2T5so3n6P6KQ4pehranYeawMoEMYeDiFICJ2LowzNN7tu/f4QmC7Stz rR5JeZ7pcwrlPswwz+rZirVH8ktvGgdNCpYQW5wTePNWDAA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== 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 The Linux kernel CVE team has assigned CVE-2026-43347 to this issue. Affected and fixed versions =========================== Issue introduced in 6.14 with commit 7be190e4bdd2bd1aca84afef06bb755c06a85473 and fixed in 6.18.24 with commit edde62571f7602d83243ca51729ce42d22ea04d2 Issue introduced in 6.14 with commit 7be190e4bdd2bd1aca84afef06bb755c06a85473 and fixed in 6.19.14 with commit 59bd9088336d2bb7e713dcf4df5cbda86bb3c611 Issue introduced in 6.14 with commit 7be190e4bdd2bd1aca84afef06bb755c06a85473 and fixed in 7.0 with commit 85d98669fa7f1d3041d962515e45ee6e392db6f8 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-43347 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: arch/arm64/boot/dts/qcom/monaco.dtsi Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/edde62571f7602d83243ca51729ce42d22ea04d2 https://git.kernel.org/stable/c/59bd9088336d2bb7e713dcf4df5cbda86bb3c611 https://git.kernel.org/stable/c/85d98669fa7f1d3041d962515e45ee6e392db6f8