From patchwork Tue Sep 15 19:16:20 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaipaul Cheernam X-Patchwork-Id: 98344 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id D262CC982CA for ; Tue, 15 Sep 2026 19:16:43 +0000 (UTC) Received: from DU2PR03CU002.outbound.protection.outlook.com (DU2PR03CU002.outbound.protection.outlook.com [52.101.65.29]) by mx.groups.io with SMTP id smtpd.msgproc02-g2.4960.1789499791346222233 for ; Tue, 15 Sep 2026 12:16:34 -0700 Authentication-Results: mx.groups.io; dkim=fail reason="dkim: body hash did not verify" header.i=@est.tech header.s=selector1 header.b=ZMj1OO0m; spf=pass (domain: est.tech, ip: 52.101.65.29, mailfrom: jaipaul.cheernam@est.tech) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=jJBmFNGFUubCZVUozz0MlX2N5N5i8PS1ZLwzgb3bKd/pk5Cl14x4D5nBdeIWxb5FuK8pQY22ioECmoVP/1xViLNgHRYeC7bxJyku8c8o+s/w4z7LpwNM6MKGPlO45BNQKLVB2Hy8XGnWyE2eJc5Ej0ZGX6btrR9mk91seactXzv2uimw4k7ti08xPzinfPHAD2vcVuN6wmLrpeqccI12O0r3AtWjRUMPwOlnHYVSpbrf6ko6p3J390IeD/Kymi4PvFEsE26nJqzembaJiqhHHC3fAqlmKnbTerMGZHZU9HQwjEb8rxVjZNfIf3yFjXf2HRPamNQ+crwc4ifQ0gpqCA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=w8X+TaI1dwNFvM6UOU0gNUhwnitloxOMZ6wkYKKqvl8=; b=CnZsF+rEymE5/4P+YK6R1Chp5QB0/gBPnY41wyR/ARRH/+4HDZCe6mIxQV8FS1kvCMn+46WLNQ33Kenttf1oaOgyZTepfMBw7LKF6BKXwzqtcdYGOvPmwSGoJ7gq2qsazIL+TcxS58+N3WH++BC5FluoAW4nHTATmP8ObndzVwmG9e+kDA3/sIR2asjb+jNwlTzII+CPEqr8DzzByk82zAtp6Z3tnB2Af4DSF/ICJK9KfeajGMGkaRIX1nNRzuUuvffj+T+nkPmlSwdAFpxHjAyYUHhA3k0fhlYffEmAV1kDxQ6BEx4cuL9zXdpgR9CsVRuDWru37RtzEy0UWCcqcA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=est.tech; dmarc=pass action=none header.from=est.tech; dkim=pass header.d=est.tech; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=est.tech; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=w8X+TaI1dwNFvM6UOU0gNUhwnitloxOMZ6wkYKKqvl8=; b=ZMj1OO0mjm3htOAx0BYKlZT5qs1drQaDBBLbICWw8UNxL0Sk+X4/6aUMFJ/lah5HUBOnDMd00oV+o/iqqRHIaWSj7mIoIAqVGHuhmdvWtVqfY5a3wP5rilqrw1jCZ9+eVVDQZZS9MyIn/siWeCTEWXLsf168I/4OaMpaWHKq8rMdW7dAQ+1frUHuMOGL2Z3CZAh6dFNuPVv6R/6SzgPzs/wRIqPj9eZACtDS1SVt9SQBYY3lwGUMn+LrGhAevY/gF4Lz4Q7fCIkDtvhTWUzeZWpPhN99i5EUmKNh7snTZJRcmMbFEBAWVEef5uCwQhgNUn2Whc+UVhskO0UGzGUuZA== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=est.tech; Received: from DU7PPF66507B2D7.EURP189.PROD.OUTLOOK.COM (2603:10a6:18:3::ad4) by AM7PPFCA14042DD.EURP189.PROD.OUTLOOK.COM (2603:10a6:20f:fff1::6a8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.428.9; Tue, 15 Sep 2026 19:16:32 +0000 Received: from DU7PPF66507B2D7.EURP189.PROD.OUTLOOK.COM ([fe80::bf0:7714:72e:1666]) by DU7PPF66507B2D7.EURP189.PROD.OUTLOOK.COM ([fe80::bf0:7714:72e:1666%7]) with mapi id 15.21.0406.007; Tue, 15 Sep 2026 19:16:32 +0000 From: Jaipaul Cheernam To: openembedded-core@lists.openembedded.org Subject: [wrynose][PATCH v2 4/7] libpcap: Fix CVE-2026-6244 Date: Tue, 15 Sep 2026 21:16:20 +0200 Message-ID: <20260915191623.42107-5-jaipaul.cheernam@est.tech> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20260915191623.42107-1-jaipaul.cheernam@est.tech> References: <20260910051154.30595-2-jaipaul.cheernam@est.tech> <20260915191623.42107-1-jaipaul.cheernam@est.tech> X-ClientProxiedBy: DU2PR04CA0264.eurprd04.prod.outlook.com (2603:10a6:10:28e::29) To DU7PPF66507B2D7.EURP189.PROD.OUTLOOK.COM (2603:10a6:18:3::ad4) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DU7PPF66507B2D7:EE_|AM7PPFCA14042DD:EE_ X-MS-Office365-Filtering-Correlation-Id: aaa412b6-ae99-4e06-8733-08df135dda07 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|23010399003|6133799003|12006099003|18002099003|22082099003|13003099007|10067099003|11063799006|56012099006|4143699003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DU7PPF66507B2D7.EURP189.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(376014)(23010399003)(6133799003)(12006099003)(18002099003)(22082099003)(13003099007)(10067099003)(11063799006)(56012099006)(4143699003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: est.tech X-MS-Exchange-CrossTenant-Network-Message-Id: aaa412b6-ae99-4e06-8733-08df135dda07 X-MS-Exchange-CrossTenant-AuthSource: DU7PPF66507B2D7.EURP189.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Sep 2026 19:16:32.1818 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: d2585e63-66b9-44b6-a76e-4f4b217d97fd X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Aw1FA3PxjCorZ52ECXcI/Cz3uYkt1lsTYP3/U1+obZQTKXchGPHh25k2laHFSfMlAHeNbYZ1RJOvhsTb2qfpmMip36J2kh4laPVYltAfZHM= X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7PPFCA14042DD List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Tue, 15 Sep 2026 19:16:43 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/245871 NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6244 Upstream-commit: https://github.com/the-tcpdump-group/libpcap/commit/98bb921b141aa642faedbf2ac510541c76499a19 Signed-off-by: Jaipaul Cheernam --- .../libpcap/libpcap/04-CVE-2026-6244.patch | 50 +++++++++++++++++++ .../libpcap/libpcap_1.10.6.bb | 1 + 2 files changed, 51 insertions(+) create mode 100644 meta/recipes-connectivity/libpcap/libpcap/04-CVE-2026-6244.patch diff --git a/meta/recipes-connectivity/libpcap/libpcap/04-CVE-2026-6244.patch b/meta/recipes-connectivity/libpcap/libpcap/04-CVE-2026-6244.patch new file mode 100644 index 0000000000..b7fec6b554 --- /dev/null +++ b/meta/recipes-connectivity/libpcap/libpcap/04-CVE-2026-6244.patch @@ -0,0 +1,50 @@ +From e2f4d78f71237c44f730fee11fa0497b756e9d81 Mon Sep 17 00:00:00 2001 +From: Denis Ovsienko +Date: Thu, 30 Jul 2026 13:34:21 +0100 +Subject: [PATCH] CVE-2026-6244: Avoid division by zero via + pcap_offline_filter(). + +The current revision of pcapint_filter_with_aux_data() for "div x" and +"mod x" correctly rejects the packet if X is zero, but for "div #k" and +"mod #k" it assumes that k is never zero. This holds for programs that +have been generated or validated by libpcap. + +However, this does not necessarily hold for programs that come from an +external source via pcap_offline_filter() or [deprecated] bpf_filter() +and have not been explicitly validated. If the interpreter executes +such a program, it can attempt a division by zero, which will typically +terminate the process via SIGFPE. + +To fix this problem, in pcapint_filter_with_aux_data() treat "div #k" +and "mod #k" the same way as "div x" and "mod x". + +(backported from commit 0b2b1ad4a1796513613ff68e9dc09049cc8e0af4) + +(cherry picked from commit 98bb921b141aa642faedbf2ac510541c76499a19) + +Notes on backporting to 1.10.6: + - The upstream CHANGES/changelog hunk is not backported. + +Upstream-Status: Backport [https://github.com/the-tcpdump-group/libpcap/commit/98bb921b141aa642faedbf2ac510541c76499a19] +CVE: CVE-2026-6244 +Signed-off-by: Jaipaul Cheernam +--- +diff --git a/bpf_filter.c b/bpf_filter.c +index f8b842d6..0178aae5 100644 +--- a/bpf_filter.c ++++ b/bpf_filter.c +@@ -420,10 +420,14 @@ DIAG_ON_DEFAULT_ONLY_SWITCH + continue; + + case BPF_ALU|BPF_DIV|BPF_K: ++ if (pc->k == 0) ++ return 0; + A /= pc->k; + continue; + + case BPF_ALU|BPF_MOD|BPF_K: ++ if (pc->k == 0) ++ return 0; + A %= pc->k; + continue; + diff --git a/meta/recipes-connectivity/libpcap/libpcap_1.10.6.bb b/meta/recipes-connectivity/libpcap/libpcap_1.10.6.bb index da218bd87b..258a15f5ba 100644 --- a/meta/recipes-connectivity/libpcap/libpcap_1.10.6.bb +++ b/meta/recipes-connectivity/libpcap/libpcap_1.10.6.bb @@ -15,6 +15,7 @@ SRC_URI = "https://www.tcpdump.org/release/${BP}.tar.xz \ file://01-CVE-2026-0799.patch \ file://02-CVE-2026-31912.patch \ file://03-CVE-2026-31911.patch \ + file://04-CVE-2026-6244.patch \ " SRC_URI[sha256sum] = "ec97d1206bdd19cb6bdd043eaa9f0037aa732262ec68e070fd7c7b5f834d5dfc"