From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EF6BA3EDADB for ; Fri, 8 May 2026 14:23:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250221; cv=none; b=C3Ci6poSXltNs/fyHbXDIsdwkUGFB/evvU4kW6lsFZhbOhOQC0oozl+wSMkvIZ50K0JMuJBMM1EEItZ1jC39H72QQEXjRdbZrHbh3c834tpX5azH0zXsBD8EbkmttXsH8kRPbPEG0qxz5sg2zcgLD5Rdln4wRCc2Zh94jABtfU0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250221; c=relaxed/simple; bh=YOLfntTD0bfO/itykN+ztn0mpRmMTSPgYrF/n4RyLOE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=beahw0xVJByuTBdT6SZlLiaLCyAHl5oazP/gAmOx4p3wgBtd+6SKasKY3MpXUuAnXzc9RPrj2TLfEok6lgzappYRucNyYM28QggjK2jKSr53FN1UIBo3t51WGxhObzNNL5mwqyNK9S3vycot3iUVkZqyW0/66SahS5fa0yrhtVQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=I6qvX3IO; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="I6qvX3IO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8694BC2BCB0; Fri, 8 May 2026 14:23:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250220; bh=YOLfntTD0bfO/itykN+ztn0mpRmMTSPgYrF/n4RyLOE=; h=From:To:Cc:Subject:Date:Reply-To:From; b=I6qvX3IOlb39y7gJKzvM3GFc8V06kYy9WxXsVAhP7aTVabMCa9sYroH6n0RJXnyDZ 8PKBHhySYbmQYmsr+XLqEkkXFUci1C/idtYDsOmH/THnmMp0+eQehhCe3P8n+F2o/B 9bHF3oD0cVZ88hTNQqTn2lSaPna5CNRe836a1yGA= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43384: net/tcp-ao: Fix MAC comparison to be constant-time Date: Fri, 8 May 2026 16:21:53 +0200 Message-ID: <2026050834-CVE-2026-43384-d8ea@gregkh> X-Mailer: git-send-email 2.54.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2340; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=gw0SpFmQ8XMp0zj2ZxdLPogUOy+fo0OubyjbXwolbUE=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/P+bZN7DETyy/vi9+w8kABa3/wef0frGklRdkLbNQ/ zbDft+BjlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZhI40eGBUdk6iXzb7fN/mMq E+Uo3GuzmilxO8OClXHfGt7tV2z2S2iuvbbwqaW7Y/duAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: net/tcp-ao: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this. The Linux kernel CVE team has assigned CVE-2026-43384 to this issue. Affected and fixed versions =========================== Issue introduced in 6.7 with commit 0a3a809089eb1d4a0a2fd0c16b520d603988c859 and fixed in 6.12.78 with commit 8be6ed64966da48b6c4726918f106c18742a5125 Issue introduced in 6.7 with commit 0a3a809089eb1d4a0a2fd0c16b520d603988c859 and fixed in 6.18.19 with commit a269cbdc442f8658bca35383e34b9d0b0ff95a1c Issue introduced in 6.7 with commit 0a3a809089eb1d4a0a2fd0c16b520d603988c859 and fixed in 6.19.9 with commit 080b0e210088296dd50d6637c06c1db14246adfe Issue introduced in 6.7 with commit 0a3a809089eb1d4a0a2fd0c16b520d603988c859 and fixed in 7.0 with commit 67edfec516d30d3e62925c397be4a1e5185802fc Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-43384 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: net/ipv4/Kconfig net/ipv4/tcp_ao.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/8be6ed64966da48b6c4726918f106c18742a5125 https://git.kernel.org/stable/c/a269cbdc442f8658bca35383e34b9d0b0ff95a1c https://git.kernel.org/stable/c/080b0e210088296dd50d6637c06c1db14246adfe https://git.kernel.org/stable/c/67edfec516d30d3e62925c397be4a1e5185802fc