From nobody Tue Apr 7 21:45:29 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1773241932; cv=none; d=zohomail.com; s=zohoarc; b=j8e0LRdKJmhHDIUPMmGm4/xWkVJOGhWqhyxCA16jUnatjo4/pFgzsCNmXVbl1f7Ms40WzZd6ozar/tlk0yz+OjvuhxlC2YUVGAiN49Kx5tHDrSpbymzmw4F73H/YVMLBUxwBUXSs9NGjcsin6/745iofjgFeh374PZ2ZVxN1aUY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1773241932; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=w6TUKJ404faB2yseHxEClln5N4dMGgOqT34UyNPtfyU=; b=JjZE6bOfXPJ2sYiTsj2HJDwxK6ENrINxggESlwNPmNQlWv1m/212+jOD8v4zSXNWFxO2FW2g/epeisd1hHtHpefMiDInbbQc1gnIs8siRoSBTvY0G7TP+xgMNM0rj3JNfh1iv9kdKznagnyOfwTYFhajI8EXIRNKPykWmyyjyHQ= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1773241932973969.0510363016981; Wed, 11 Mar 2026 08:12:12 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w0LAV-000672-Cm; Wed, 11 Mar 2026 11:08:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w0L7C-00085r-TE; Wed, 11 Mar 2026 11:04:53 -0400 Received: from isrv.corpit.ru ([212.248.84.144]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w0L7B-0004Jb-DM; Wed, 11 Mar 2026 11:04:50 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 928A2191E5C; Wed, 11 Mar 2026 18:01:45 +0300 (MSK) Received: from think4mjt.tls.msk.ru (mjtthink.wg.tls.msk.ru [192.168.177.146]) by tsrv.corpit.ru (Postfix) with ESMTP id 7634337C2AE; Wed, 11 Mar 2026 18:02:23 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=tls.msk.ru; s=202602; t=1773241305; bh=5gcbLveQYJeMxh9AzYQZOmJnl2B2tTcvAjJUsd4Kvhc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=lZ3Byfx7/V67u7Yc2ak7zYUdl7CPxS1MaQPju9BLaP//qSlefReJSQGE0ZVmYWZeU 139YhZLm73eG4EOBcWPYCmTHqw3crHLKJu5COL0/kdet0hYw8B4fy0vhRqVV9C9BZz xtqkrV8ceaU1nZkcPyygcW8LWYNr64NVenTv/X6azmvi+FJPac7U+yVsPFv/91DLkl /2hjG4iScsw97V08w2zS9+k+P/Uz14AlLXq1HQ2FCQjS4QQjGi+VVmp1x4daiYnKXZ 4NcykoduiCsLLepDMcTr/ZagirmHIT3+/pD6lzlhLKSq4CFtGK9zZtylU7mmBtCxEN AgCjb4MlNlAzw== From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, "Halil Oktay (oblivionsage)" , Kevin Wolf , Michael Tokarev Subject: [Stable-10.0.9 30/44] block/vmdk: fix OOB read in vmdk_read_extent() Date: Wed, 11 Mar 2026 18:02:02 +0300 Message-ID: <20260311150221.1084186-30-mjt@tls.msk.ru> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=212.248.84.144; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -2 X-Spam_score: -0.3 X-Spam_bar: / X-Spam_report: (-0.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.819, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.903, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @tls.msk.ru) X-ZM-MESSAGEID: 1773241934891158500 Content-Type: text/plain; charset="utf-8" From: "Halil Oktay (oblivionsage)" Bounds check for marker.size doesn't account for the 12-byte marker header, allowing zlib to read past the allocated buffer. Move the check inside the has_marker block and subtract the marker size. Fixes: CVE-2026-2243 Reported-by: Halil Oktay (oblivionsage) Signed-off-by: Halil Oktay (oblivionsage) Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf (cherry picked from commit cfda94eddb6c9c49b66461c950b22845a46a75c9) Signed-off-by: Michael Tokarev diff --git a/block/vmdk.c b/block/vmdk.c index 5a53c4624a..ffdaf3c901 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -1949,10 +1949,10 @@ vmdk_read_extent(VmdkExtent *extent, int64_t cluste= r_offset, marker =3D (VmdkGrainMarker *)cluster_buf; compressed_data =3D marker->data; data_len =3D le32_to_cpu(marker->size); - } - if (!data_len || data_len > buf_bytes) { - ret =3D -EINVAL; - goto out; + if (!data_len || data_len > buf_bytes - sizeof(VmdkGrainMarker)) { + ret =3D -EINVAL; + goto out; + } } ret =3D uncompress(uncomp_buf, &buf_len, compressed_data, data_len); if (ret !=3D Z_OK) { --=20 2.47.3