From nobody Wed Aug 26 05:51:46 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=1779486708; cv=none; d=zohomail.com; s=zohoarc; b=LBAEf1M10h+kzqJM0RAJsoTlHAyaQx5blpyPudIIP/rJx/JpvBCI16bOFfxEps1JK2nch8dBgjCXMLEqw4WMq0YYiK5ZRNHr8OP+MVfe0TkxXyyxLJche3nsvHpmNwFKr3nrAb910TOLoOiB5FYauX1sAETNrBwn7kTh0UxTXvA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1779486708; 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=Wy48ihaQzXyDqd27VAOgiTI0BExEicnPsyGlI3B/DGY=; b=anU9CS002PFdrA0vHtytuSbNqXI9HnqjY7RszFrxC906ugyx3ZSeya3vVWvs4l4IaAD5ONdtqeG1SmbDKLw7t9gHE0C0mrZxzCm5NL8EuN/BsAsciKMkEj0Sua6Z40BskQk7UsNA/OwnNICWW/Yhj83F7u2RtgY651A1rFZcZXg= 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 lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1779486708626527.0792582869358; Fri, 22 May 2026 14:51:48 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wQXlj-00018o-CY; Fri, 22 May 2026 17:50:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wQXlR-0008Fc-4i; Fri, 22 May 2026 17:50:41 -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 1wQXlM-0003KZ-G7; Fri, 22 May 2026 17:50:38 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 168BB1AFB69; Sat, 23 May 2026 00:49:20 +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 345AE3B71B8; Sat, 23 May 2026 00:49:24 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=tls.msk.ru; s=202602; t=1779486560; bh=JIKFRlQIwK1/FxLkJ2ppK44nheMtdlfIIxo/AMV79x0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MCyeqW5d42ecFwGSZUTC4s6fxFkgR70jbIlDLkmDFKSY8oKWBYG54G+emJOxA8AnA L08BTetXLLD+wT2a4336//Sq2p8mVofBqTZBx4h5GGfr9er2/Jk5tkVJ+dFp9a8Wko o1kJMLiqN5RVYIxpBKpy07tDlG2a6od3O6mCnwMkef4++Z7htxaM4EIW6KA21B9D0c Jlc8MHQeM3VsB5A3dDrd1ufJGkSbKQQmeC9jsu6mo6sm3+pCgk1pk7MgcpoXPKth8X Lj8cPGlOZ0oU4RmDZzk6XChmhtRT952GHUi/9CLgqr4oZESApEFgBH23NNbz1U+6gl +oW/AYyrHF69w== From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Gerd Hoffmann , Katherine Leaver , Michael Tokarev Subject: [Stable-10.2.3 115/149] hw/uefi: add name_size check to uefi_vars_mm_lock_variable() Date: Sat, 23 May 2026 00:48:47 +0300 Message-ID: <20260522214923.807017-16-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=lists1p.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: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, SPF_HELO_NONE=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 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: 1779486711337154100 Content-Type: text/plain; charset="utf-8" From: Gerd Hoffmann Make sure the total variable_policy_entry size stays below 64k so the (16-bit) size field can not wrap. Fixes: CVE-2026-41438 Fixes: db1ecfb473ac ("hw/uefi: add var-service-vars.c") Reported-by: Katherine Leaver Signed-off-by: Gerd Hoffmann Message-ID: <20260422092910.444997-5-kraxel@redhat.com> (cherry picked from commit c45b460d16f991ff3f753623f3423e1adc4077a2) Signed-off-by: Michael Tokarev diff --git a/hw/uefi/var-service-vars.c b/hw/uefi/var-service-vars.c index 922f6dd963..d7187e006d 100644 --- a/hw/uefi/var-service-vars.c +++ b/hw/uefi/var-service-vars.c @@ -629,6 +629,9 @@ uefi_vars_mm_lock_variable(uefi_vars_state *uv, mm_head= er *mhdr, if (mhdr->length < length) { return uefi_vars_mm_error(mhdr, mvar, EFI_BAD_BUFFER_SIZE); } + if (sizeof(*pe) + lv->name_size > UINT16_MAX) { + return uefi_vars_mm_error(mhdr, mvar, EFI_BAD_BUFFER_SIZE); + } =20 uefi_trace_variable(__func__, lv->guid, name, lv->name_size); =20 --=20 2.47.3