From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 43FAA371076 for ; Fri, 4 Sep 2026 15:17:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788535027; cv=none; b=Ky+zXAogpa0Nfy21dukrc11ZvWvsGnzssL939zFOEV0cEZvi0m7kf5/CvcnlT/fe+LGFebbskb0UFb0+hd/xRr6FFPBLjq2CpU73OWru7gk2+orTAYaUIJLg25aJrt+G85EkiCk5mCCdp/MS+1GxgG2QfaSN4QebbzwOstjBGys= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788535027; c=relaxed/simple; bh=CbTNRqpR85jjRatAL5Qa80faZSgz9vVAzsDsnVRuzJo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=QDtViDbjt0hXhq4G/bLoMopp6M1cSnv59jDXeYBS8WgToOmpc5BUUn5RItKiBBwfs5WElT12UDglZxckWIjS2ixXlmJ6VWdBkMfG9NxDH8myj58BjW20hCFZx0WrnyaohwNUHLYFODy16Bk3hNoq9Rq108lfB2N24b2JfA40jJo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=NTgPR67L; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="NTgPR67L" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 720FA1F00A3D; Fri, 4 Sep 2026 15:17:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788535026; bh=hSG+EzoObMSCfFcstTGG49CcdOabDSlRfRuht0M3SHg=; h=From:To:Cc:Subject:Date:Reply-To; b=NTgPR67L+HvFA3F9UdZS1jh7ZDDnsRatCMA6EkuQFvYvUyQW+2UGldLz6rGLAbwDY v5zsTvvEbczlYbcMJT4ftbjzcdqF+Po3pKfFQf7D+72MqJXA5cq/NGPE67c1fg6RpI 9N+J5osS8spsn/sy9v2c0NrOrcvupe8xMgWzFf4I= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-80765: HID: hyperv: validate initial device info bounds Date: Fri, 4 Sep 2026 17:11:04 +0200 Message-ID: <2026090400-CVE-2026-80765-9e7e@gregkh> X-Mailer: git-send-email 2.55.0 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=4066; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=l9XR4QsEpzu/ULWURPZbRQNM03GskRzdavYISBzrM/c=; b=owGbwMvMwCRo6H6F97bub03G02pJDFmz7rd8P1tUEn2RmT/i+LvpdzpcORn2Om/gOfmo/NmRA 3fCu82FOmJZGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAixyIY5leI3uDdtZS3TOeZ nbuC5/dT4bfZ7zIsWNk7Ka4q7EK8ycRfre+5tDO2a/pPAgA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: HID: hyperv: validate initial device info bounds The Hyper-V synthetic HID host supplies SYNTH_HID_INITIAL_DEVICE_INFO messages that contain a HID descriptor followed by the report descriptor bytes. mousevsc_on_receive_device_info() trusts bLength and wDescriptorLength without checking that the received packet contains both byte ranges. A malformed host or backend message can therefore make the guest read past the received VMBus packet while copying the report descriptor. Pass the received initial-device-info size into the parser and reject descriptor lengths that exceed the packet. Impact: A malicious Hyper-V host or backend can crash a guest by sending a short initial device-info message with an oversized HID report descriptor length. The Linux kernel CVE team has assigned CVE-2026-80765 to this issue. Affected and fixed versions =========================== Issue introduced in 3.3 with commit b95f5bcb811e3905b5376f87789da8d097fee682 and fixed in 5.10.267 with commit e0d5d3e45e142b7ef7525654aaa54d3e986002a6 Issue introduced in 3.3 with commit b95f5bcb811e3905b5376f87789da8d097fee682 and fixed in 5.15.218 with commit 390d3d9c52a710fdc9de95a537747397c0c671d1 Issue introduced in 3.3 with commit b95f5bcb811e3905b5376f87789da8d097fee682 and fixed in 6.1.185 with commit 8614c043b11cc35ffebd35542ab4da275f8f923d Issue introduced in 3.3 with commit b95f5bcb811e3905b5376f87789da8d097fee682 and fixed in 6.6.154 with commit 334271d3812ab3197c95b4593bc6745f8d189114 Issue introduced in 3.3 with commit b95f5bcb811e3905b5376f87789da8d097fee682 and fixed in 6.12.106 with commit f84d777574b748b1a488723ca7be9d87a301a872 Issue introduced in 3.3 with commit b95f5bcb811e3905b5376f87789da8d097fee682 and fixed in 6.18.47 with commit 608f8fd8c0f7b6268da43509447802955f210aac Issue introduced in 3.3 with commit b95f5bcb811e3905b5376f87789da8d097fee682 and fixed in 7.1.11 with commit 2529737763cb4bcfcaf397beeea2664656c865b4 Issue introduced in 3.3 with commit b95f5bcb811e3905b5376f87789da8d097fee682 and fixed in 7.2.1 with commit c894143c508a7e063aab9f73c9e835ab40121283 Issue introduced in 3.3 with commit b95f5bcb811e3905b5376f87789da8d097fee682 and fixed in 7.3-rc1 with commit 934b7778aa7b7c8f6bb073d2a73ba3674885bae0 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-2026-80765 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: drivers/hid/hid-hyperv.c 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/e0d5d3e45e142b7ef7525654aaa54d3e986002a6 https://git.kernel.org/stable/c/390d3d9c52a710fdc9de95a537747397c0c671d1 https://git.kernel.org/stable/c/8614c043b11cc35ffebd35542ab4da275f8f923d https://git.kernel.org/stable/c/334271d3812ab3197c95b4593bc6745f8d189114 https://git.kernel.org/stable/c/f84d777574b748b1a488723ca7be9d87a301a872 https://git.kernel.org/stable/c/608f8fd8c0f7b6268da43509447802955f210aac https://git.kernel.org/stable/c/2529737763cb4bcfcaf397beeea2664656c865b4 https://git.kernel.org/stable/c/c894143c508a7e063aab9f73c9e835ab40121283 https://git.kernel.org/stable/c/934b7778aa7b7c8f6bb073d2a73ba3674885bae0