From patchwork Mon Aug 24 04:21:23 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Junjie Cao X-Patchwork-Id: 96124 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 DF4E4C5DF97 for ; Mon, 24 Aug 2026 02:23:42 +0000 (UTC) Received: from mta0.migadu.com (mta0.migadu.com [91.218.175.104]) by mx.groups.io with SMTP id smtpd.msgproc01-g2.8457.1787538213511796482 for ; Sun, 23 Aug 2026 19:23:33 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@linux.dev header.s=key1 header.b=siSW86hx; spf=pass (domain: linux.dev, ip: 91.218.175.104, mailfrom: junjie.cao@linux.dev) X-Envelope-To: openembedded-core@lists.openembedded.org DKIM-Signature: a=rsa-sha256; bh=YuzcV3cpAkWBYxsF++ENJKXzEd/h+DU4NZgBxOQCE3g=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1787538211; v=1; x=1788143011; b=siSW86hxVNC9AXhMD7LChTQQPyhNx2C3LJdbXAJF6/YiG9nwOq+yEro6FsE+TmGe/P6z+c/5 xjSd9csU8TG843xOL0Q01LnhMv6dWbnojVm6IOATOS9ju0CpNWOcsULq1JCTd8l8aKS6rf1QvaN N3avmHa3sHoWGn/poW343fPU= X-Envelope-To: openembedded-core@lists.openembedded.org Received: from localhost (2408:8806:52:f8ea:5de6:8d95:1672:70f3) by smtp.migadu.com with ESMTPS id 71a6d3be8ebede7c; Mon, 24 Aug 2026 02:23:31 +0000 X-Mizu-Trace-ID: 71a6d3be8ebede7c X-Migadu-Flow: FLOW_OUT From: Junjie Cao To: openembedded-core@lists.openembedded.org Cc: paul@pbarker.dev Subject: [OE-core][PATCH v4 8/8] cve-exclusions: set status for CVE-2023-6240 Date: Sun, 23 Aug 2026 23:21:23 -0500 Message-ID: <20260824042123.1456876-9-junjie.cao@linux.dev> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260824042123.1456876-1-junjie.cao@linux.dev> References: <20260824042123.1456876-1-junjie.cao@linux.dev> MIME-Version: 1.0 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 ; Mon, 24 Aug 2026 02:23:42 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/244054 "Marvin" is Hubert Kario's Bleichenbacher-style timing oracle research: https://people.redhat.com/~hkario/marvin/ The affected code is the generic software RSA PKCS#1 v1.5 unpadding in crypto/rsa-pkcs1pad.c. pkcs1pad_decrypt_complete() has three secret-dependent early exits (leading zero byte, block type, minimum padding length) and a loop whose trip count depends on the position of the separator, so the time taken reveals padding validity. There is no constant-time unpadding or implicit-rejection fallback in the tree. Red Hat classifies it CWE-203 and has shipped fixes only in RHEL errata (RHSA-2024:2758, RHSA-2024:3618 and others); the bugzilla is still NEW. Ubuntu records "appears unfixed in upstream as of 2024.08.24" and Debian lists src:linux vulnerable in all suites: https://access.redhat.com/security/cve/CVE-2023-6240 https://ubuntu.com/security/CVE-2023-6240 https://security-tracker.debian.org/tracker/CVE-2023-6240 CC: Paul Barker AI-Generated: Uses Claude (claude-opus-5) Signed-off-by: Junjie Cao --- v4: - drop the practical-exposure paragraph; use the review's comment and status wording - quote Ubuntu's note verbatim v3: https://lore.kernel.org/openembedded-core/20260812072842.1176341-1-junjie.cao@linux.dev/ meta/recipes-kernel/linux/cve-exclusion.inc | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/meta/recipes-kernel/linux/cve-exclusion.inc b/meta/recipes-kernel/linux/cve-exclusion.inc index 4729191a..8714173c 100644 --- a/meta/recipes-kernel/linux/cve-exclusion.inc +++ b/meta/recipes-kernel/linux/cve-exclusion.inc @@ -250,3 +250,13 @@ CVE_STATUS[CVE-2023-3397] = "unpatched: Proposed fix was withdrawn" # https://ubuntu.com/security/CVE-2023-6238 # https://lore.kernel.org/linux-nvme/20231016060519.231880-1-joshi.k@samsung.com/ CVE_STATUS[CVE-2023-6238] = "unpatched: Proposed fix was not merged" + +# Triaged August 2026 - "Marvin" attack, Red Hat reports this fixed but the +# exact patch is unidentified (see RHSA-2024:2758, RHSA-2024:3618 & others). +# Unfixed in Debian, "Needs evaluation" in Ubuntu. +# https://people.redhat.com/~hkario/marvin/ +# https://access.redhat.com/security/cve/cve-2023-6240 +# https://security-tracker.debian.org/tracker/CVE-2023-6240 +# https://ubuntu.com/security/CVE-2023-6240 +CVE_STATUS[CVE-2023-6240] = "unpatched: Fixed in RHEL but patch not identified \ +publicly"