From patchwork Mon Aug 24 04:21:17 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Junjie Cao X-Patchwork-Id: 96118 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 E1988C5DF9C for ; Mon, 24 Aug 2026 02:22:52 +0000 (UTC) Received: from mta1.migadu.com (mta1.migadu.com [95.215.58.235]) by mx.groups.io with SMTP id smtpd.msgproc01-g2.8450.1787538169652705256 for ; Sun, 23 Aug 2026 19:22:49 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@linux.dev header.s=key1 header.b=DBllYQBV; spf=pass (domain: linux.dev, ip: 95.215.58.235, mailfrom: junjie.cao@linux.dev) X-Envelope-To: openembedded-core@lists.openembedded.org DKIM-Signature: a=rsa-sha256; bh=fn3Kt76z/ne0wvF+12NhERrQBvQKUU7HbJv4M0uxCt4=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1787538167; v=1; x=1788142967; b=DBllYQBV5fYXWak4OIt3hsn+Hbll7vf0zNQgCoR6c/HXA8V321D4NtHFbBVfmVIYtF2bZUiO ozxBzqFFAjAUKWunO4AlUXzaZ6gynX0v418BqDB9dGqaYqjm0/XHOOu9/1IP+4VStQcgP35Q9bE 4NjtfjYVHWi0p8pSYH6dAnSA= 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 5773324741d78868; Mon, 24 Aug 2026 02:22:47 +0000 X-Mizu-Trace-ID: 5773324741d78868 X-Migadu-Flow: FLOW_OUT From: Junjie Cao To: openembedded-core@lists.openembedded.org Cc: paul@pbarker.dev Subject: [OE-core][PATCH v4 2/8] cve-exclusions: set status for CVE-2021-3714 Date: Sun, 23 Aug 2026 23:21:17 -0500 Message-ID: <20260824042123.1456876-3-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 02:22:52 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/244048 KSM merges identical anonymous pages across processes. An attacker who can place chosen page-sized content in a victim's memory can detect the merge through the timing of the resulting copy-on-write fault, and so leak memory contents. There is no upstream fix; removing the side channel means removing deduplication. Distribution trackers describe it the same way - Debian marks src:linux unfixed with "Inherent design limitation, can be avoided by not using KSM", Red Hat closed its bug WONTFIX, and Ubuntu records no upstream fix as of 2024-06-17: https://security-tracker.debian.org/tracker/CVE-2021-3714 https://bugzilla.redhat.com/show_bug.cgi?id=1931327 https://ubuntu.com/security/CVE-2021-3714 CC: Paul Barker AI-Generated: Uses Claude (claude-opus-5) Signed-off-by: Junjie Cao --- v4: - use the review's comment and status wording; drop the KSM runtime opt-in paragraph v3: https://lore.kernel.org/openembedded-core/20260812072842.1176341-1-junjie.cao@linux.dev/ meta/recipes-kernel/linux/cve-exclusion.inc | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/meta/recipes-kernel/linux/cve-exclusion.inc b/meta/recipes-kernel/linux/cve-exclusion.inc index b2eb15d0..36643ccc 100644 --- a/meta/recipes-kernel/linux/cve-exclusion.inc +++ b/meta/recipes-kernel/linux/cve-exclusion.inc @@ -197,3 +197,12 @@ CVE_STATUS[CVE-2025-71145] = "cpe-stable-backport: Fixed from v6.18.3" # https://ubuntu.com/security/CVE-2019-14899 CVE_STATUS[CVE-2019-14899] = "unpatched: Consequence of the default weak host \ model, no upstream fix" + +# Triaged August 2026 - no upstream fix, Debian says "Inherent design +# limitation, can be avoided by not using KSM", Red Hat closed their bug as +# WONTFIX. +# https://security-tracker.debian.org/tracker/CVE-2021-3714 +# https://bugzilla.redhat.com/show_bug.cgi?id=1931327 +# https://ubuntu.com/security/CVE-2021-3714 +CVE_STATUS[CVE-2021-3714] = "unpatched: Timing side channel inherent to Kernel \ +Same-page Merging (KSM) page deduplication"