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GET /api/1.1/patches/2221137/?format=api
{ "id": 2221137, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2221137/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260408073403.3410541-1-kraxel@redhat.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260408073403.3410541-1-kraxel@redhat.com>", "date": "2026-04-08T07:34:02", "name": "[for,11.0] hw/uefi: fix heap overflow (CVE-2026-5744)", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "27e5a56f835ba9fb2983420c8efde60dff49a0fb", "submitter": { "id": 589, "url": "http://patchwork.ozlabs.org/api/1.1/people/589/?format=api", "name": "Gerd Hoffmann", "email": "kraxel@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260408073403.3410541-1-kraxel@redhat.com/mbox/", "series": [ { "id": 499195, "url": "http://patchwork.ozlabs.org/api/1.1/series/499195/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=499195", "date": "2026-04-08T07:34:02", "name": "[for,11.0] hw/uefi: fix heap overflow (CVE-2026-5744)", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499195/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2221137/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221137/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=cQUHQCCC;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4frXys0fxFz1xv0\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 09 Apr 2026 05:23:01 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wAYSj-0003lJ-Ro; Wed, 08 Apr 2026 15:21:17 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <kraxel@redhat.com>) id 1wAY3n-00064g-5s\n for qemu-devel@nongnu.org; Wed, 08 Apr 2026 14:55:31 -0400", "from us-smtp-delivery-124.mimecast.com ([170.10.129.124])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <kraxel@redhat.com>) id 1wANQQ-0001L4-Ne\n for qemu-devel@nongnu.org; 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Wed, 08 Apr 2026 09:34:03 +0200 (CEST)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1775633648;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n bh=ezy+HD52UjJTkuVdmNzj0BC3WnJxDi0i97P4xBBU1cc=;\n b=cQUHQCCCBzszEIsAfxKxszYsMAmjltZ8pkVI4wklxirXmCOtWPt+lio6vQIfllXCCZEuVH\n Y7i0SJiiRuORoBcibI3sEPOnE51S6nJC+hX3lGhiHyTcQm5jyuQUjuGvI/Z0cMsCD9Ra81\n zqPoWxH9+tIrtJruBWCO1VHFb2C/GA0=", "X-MC-Unique": "yya9sPyDOU-g_yDcKveqMA-1", "X-Mimecast-MFC-AGG-ID": "yya9sPyDOU-g_yDcKveqMA_1775633646", "From": "Gerd Hoffmann <kraxel@redhat.com>", "To": "qemu-devel@nongnu.org", "Cc": "Gerd Hoffmann <kraxel@redhat.com>,\n\tYuma Kurogome <yumak@ricsec.co.jp>", "Subject": "[PATCH for 11.0] hw/uefi: fix heap overflow (CVE-2026-5744)", "Date": "Wed, 8 Apr 2026 09:34:02 +0200", "Message-ID": "<20260408073403.3410541-1-kraxel@redhat.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.93", "Received-SPF": "pass client-ip=170.10.129.124; envelope-from=kraxel@redhat.com;\n helo=us-smtp-delivery-124.mimecast.com", "X-Spam_score_int": "-25", "X-Spam_score": "-2.6", "X-Spam_bar": "--", "X-Spam_report": "(-2.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.54,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham 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 <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "When copying the request response into the pio transfer buffer the code\nskips the 'struct mm_header' but does not consider that when calculating\ntransfer size, so it will copy 24 (== sizeof(struct mm_header)) extra\nbytes, which can overflow uv->pio_xfer_buffer.\n\nFix that by copying the complete buffer, including the header, which\nalso makes the pio code path consistent with the (unaffected) dma code\npath.\n\nFixes: CVE-2026-5744\nFixes: 90ca4e03c27d (\"hw/uefi: add var-service-core.c\")\nReported-by: Yuma Kurogome <yumak@ricsec.co.jp>\nSigned-off-by: Gerd Hoffmann <kraxel@redhat.com>\n---\n hw/uefi/var-service-core.c | 5 ++---\n 1 file changed, 2 insertions(+), 3 deletions(-)", "diff": "diff --git a/hw/uefi/var-service-core.c b/hw/uefi/var-service-core.c\nindex ce0628fa5248..68d7594c0dd6 100644\n--- a/hw/uefi/var-service-core.c\n+++ b/hw/uefi/var-service-core.c\n@@ -137,9 +137,8 @@ static uint32_t uefi_vars_cmd_mm(uefi_vars_state *uv, bool dma_mode)\n uv->buffer, sizeof(*mhdr) + mhdr->length,\n MEMTXATTRS_UNSPECIFIED);\n } else {\n- memcpy(uv->pio_xfer_buffer + sizeof(*mhdr),\n- uv->buffer + sizeof(*mhdr),\n- sizeof(*mhdr) + mhdr->length);\n+ memcpy(uv->pio_xfer_buffer,\n+ uv->buffer, sizeof(*mhdr) + mhdr->length);\n }\n \n return retval;\n", "prefixes": [ "for", "11.0" ] }